research.m1stereo.tv/gitweb/ - melted/blob - src/modules/westley/consumer_westley.c

   1 /*
   2  * consumer_westley.c -- a libxml2 serialiser of mlt service networks
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_westley.h"
  22 #include <framework/mlt.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <pthread.h>
  27 #include <unistd.h>
  28 #include <libxml/tree.h>
  29
  30 #define ID_SIZE 128
  31
  32 // This maintains counters for adding ids to elements
  33 struct serialise_context_s
  34 {
  35         mlt_properties id_map;
  36         int producer_count;
  37         int multitrack_count;
  38         int playlist_count;
  39         int tractor_count;
  40         int filter_count;
  41         int transition_count;
  42         int pass;
  43         mlt_properties hide_map;
  44         char *root;
  45         char *store;
  46 };
  47 typedef struct serialise_context_s* serialise_context;
  48
  49 /** Forward references to static functions.
  50 */
  51
  52 static int consumer_start( mlt_consumer parent );
  53 static int consumer_is_stopped( mlt_consumer this );
  54 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node );
  55
  56 typedef enum
  57 {
  58         westley_existing,
  59         westley_producer,
  60         westley_multitrack,
  61         westley_playlist,
  62         westley_tractor,
  63         westley_filter,
  64         westley_transition
  65 }
  66 westley_type;
  67
  68 /** Create or retrieve an id associated to this service.
  69 */
  70
  71 static char *westley_get_id( serialise_context context, mlt_service service, westley_type type )
  72 {
  73         char *id = NULL;
  74         int i = 0;
  75         mlt_properties map = context->id_map;
  76
  77         // Search the map for the service
  78         for ( i = 0; i < mlt_properties_count( map ); i ++ )
  79                 if ( mlt_properties_get_data_at( map, i, NULL ) == service )
  80                         break;
  81
  82         // If the service is not in the map, and the type indicates a new id is needed...
  83         if ( i >= mlt_properties_count( map ) && type != westley_existing )
  84         {
  85                 // Attempt to reuse existing id
  86                 id = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "id" );
  87
  88                 // If no id, or the id is used in the map (for another service), then
  89                 // create a new one.
  90                 if ( id == NULL || mlt_properties_get_data( map, id, NULL ) != NULL )
  91                 {
  92                         char temp[ ID_SIZE ];
  93                         do
  94                         {
  95                                 switch( type )
  96                                 {
  97                                         case westley_producer:
  98                                                 sprintf( temp, "producer%d", context->producer_count ++ );
  99                                                 break;
 100                                         case westley_multitrack:
 101                                                 sprintf( temp, "multitrack%d", context->multitrack_count ++ );
 102                                                 break;
 103                                         case westley_playlist:
 104                                                 sprintf( temp, "playlist%d", context->playlist_count ++ );
 105                                                 break;
 106                                         case westley_tractor:
 107                                                 sprintf( temp, "tractor%d", context->tractor_count ++ );
 108                                                 break;
 109                                         case westley_filter:
 110                                                 sprintf( temp, "filter%d", context->filter_count ++ );
 111                                                 break;
 112                                         case westley_transition:
 113                                                 sprintf( temp, "transition%d", context->transition_count ++ );
 114                                                 break;
 115                                         case westley_existing:
 116                                                 // Never gets here
 117                                                 break;
 118                                 }
 119                         }
 120                         while( mlt_properties_get_data( map, temp, NULL ) != NULL );
 121
 122                         // Set the data at the generated name
 123                         mlt_properties_set_data( map, temp, service, 0, NULL, NULL );
 124
 125                         // Get the pointer to the name (i is the end of the list)
 126                         id = mlt_properties_get_name( map, i );
 127                 }
 128                 else
 129                 {
 130                         // Store the existing id in the map
 131                         mlt_properties_set_data( map, id, service, 0, NULL, NULL );
 132                 }
 133         }
 134         else if ( type == westley_existing )
 135         {
 136                 id = mlt_properties_get_name( map, i );
 137         }
 138
 139         return id;
 140 }
 141
 142 /** This is what will be called by the factory - anything can be passed in
 143         via the argument, but keep it simple.
 144 */
 145
 146 mlt_consumer consumer_westley_init( char *arg )
 147 {
 148         // Create the consumer object
 149         mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
 150
 151         // If no malloc'd and consumer init ok
 152         if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
 153         {
 154                 // Allow thread to be started/stopped
 155                 this->start = consumer_start;
 156                 this->is_stopped = consumer_is_stopped;
 157
 158                 mlt_properties_set( MLT_CONSUMER_PROPERTIES( this ), "resource", arg );
 159
 160                 // Return the consumer produced
 161                 return this;
 162         }
 163
 164         // malloc or consumer init failed
 165         free( this );
 166
 167         // Indicate failure
 168         return NULL;
 169 }
 170
 171 static void serialise_properties( serialise_context context, mlt_properties properties, xmlNode *node )
 172 {
 173         int i;
 174         xmlNode *p;
 175
 176         // Enumerate the properties
 177         for ( i = 0; i < mlt_properties_count( properties ); i++ )
 178         {
 179                 char *name = mlt_properties_get_name( properties, i );
 180                 if ( name != NULL &&
 181                          name[ 0 ] != '_' &&
 182                          mlt_properties_get_value( properties, i ) != NULL &&
 183                          strcmp( name, "westley" ) != 0 &&
 184                          strcmp( name, "in" ) != 0 &&
 185                          strcmp( name, "out" ) != 0 &&
 186                          strcmp( name, "id" ) != 0 &&
 187                          strcmp( name, "root" ) != 0 &&
 188                          strcmp( name, "width" ) != 0 &&
 189                          strcmp( name, "height" ) != 0 )
 190                 {
 191                         char *value = mlt_properties_get_value( properties, i );
 192                         if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 193                                 value += strlen( context->root ) + 1;
 194                         p = xmlNewTextChild( node, NULL, "property", value );
 195                         xmlNewProp( p, "name", name );
 196                 }
 197         }
 198 }
 199
 200 static void serialise_store_properties( serialise_context context, mlt_properties properties, xmlNode *node, char *store )
 201 {
 202         int i;
 203         xmlNode *p;
 204
 205         // Enumerate the properties
 206         for ( i = 0; store != NULL && i < mlt_properties_count( properties ); i++ )
 207         {
 208                 char *name = mlt_properties_get_name( properties, i );
 209                 if ( !strncmp( name, store, strlen( store ) ) )
 210                 {
 211                         char *value = mlt_properties_get_value( properties, i );
 212                         if ( value != NULL )
 213                         {
 214                                 if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 215                                         value += strlen( context->root ) + 1;
 216                                 p = xmlNewTextChild( node, NULL, "property", value );
 217                                 xmlNewProp( p, "name", name );
 218                         }
 219                 }
 220         }
 221 }
 222
 223 static inline void serialise_service_filters( serialise_context context, mlt_service service, xmlNode *node )
 224 {
 225         int i;
 226         xmlNode *p;
 227         mlt_filter filter = NULL;
 228
 229         // Enumerate the filters
 230         for ( i = 0; ( filter = mlt_producer_filter( MLT_PRODUCER( service ), i ) ) != NULL; i ++ )
 231         {
 232                 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 233                 if ( mlt_properties_get_int( properties, "_fezzik" ) == 0 )
 234                 {
 235                         // Get a new id - if already allocated, do nothing
 236                         char *id = westley_get_id( context, MLT_FILTER_SERVICE( filter ), westley_filter );
 237                         if ( id != NULL )
 238                         {
 239                                 int in = mlt_properties_get_position( properties, "in" );
 240                                 int out = mlt_properties_get_position( properties, "out" );
 241                                 p = xmlNewChild( node, NULL, "filter", NULL );
 242                                 xmlNewProp( p, "id", id );
 243                                 if ( in != 0 || out != 0 )
 244                                 {
 245                                         char temp[ 20 ];
 246                                         sprintf( temp, "%d", in );
 247                                         xmlNewProp( p, "in", temp );
 248                                         sprintf( temp, "%d", out );
 249                                         xmlNewProp( p, "out", temp );
 250                                 }
 251                                 serialise_properties( context, properties, p );
 252                                 serialise_service_filters( context, MLT_FILTER_SERVICE( filter ), p );
 253                         }
 254                 }
 255         }
 256 }
 257
 258 static void serialise_producer( serialise_context context, mlt_service service, xmlNode *node )
 259 {
 260         xmlNode *child = node;
 261         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service ) ) );
 262
 263         if ( context->pass == 0 )
 264         {
 265                 mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
 266                 // Get a new id - if already allocated, do nothing
 267                 char *id = westley_get_id( context, parent, westley_producer );
 268                 if ( id == NULL )
 269                         return;
 270
 271                 child = xmlNewChild( node, NULL, "producer", NULL );
 272
 273                 // Set the id
 274                 xmlNewProp( child, "id", id );
 275                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 276                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 277                 serialise_properties( context, properties, child );
 278                 serialise_service_filters( context, service, child );
 279
 280                 // Add producer to the map
 281                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 282         }
 283         else
 284         {
 285                 char *id = westley_get_id( context, parent, westley_existing );
 286                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 287                 xmlNewProp( node, "parent", id );
 288                 xmlNewProp( node, "in", mlt_properties_get( properties, "in" ) );
 289                 xmlNewProp( node, "out", mlt_properties_get( properties, "out" ) );
 290         }
 291 }
 292
 293 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node );
 294
 295 static void serialise_multitrack( serialise_context context, mlt_service service, xmlNode *node )
 296 {
 297         int i;
 298
 299         if ( context->pass == 0 )
 300         {
 301                 // Iterate over the tracks to collect the producers
 302                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 303                 {
 304                         mlt_producer producer = mlt_producer_cut_parent( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) );
 305                         serialise_service( context, MLT_SERVICE( producer ), node );
 306                 }
 307         }
 308         else
 309         {
 310                 // Get a new id - if already allocated, do nothing
 311                 char *id = westley_get_id( context, service, westley_multitrack );
 312                 if ( id == NULL )
 313                         return;
 314
 315                 // Serialise the tracks
 316                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 317                 {
 318                         xmlNode *track = xmlNewChild( node, NULL, "track", NULL );
 319                         int hide = 0;
 320                         mlt_producer producer = mlt_multitrack_track( MLT_MULTITRACK( service ), i );
 321                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 322
 323                         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( producer ) );
 324
 325                         char *id = westley_get_id( context, MLT_SERVICE( parent ), westley_existing );
 326                         xmlNewProp( track, "producer", id );
 327                         if ( mlt_producer_is_cut( producer ) )
 328                         {
 329                                 xmlNewProp( track, "in", mlt_properties_get( properties, "in" ) );
 330                                 xmlNewProp( track, "out", mlt_properties_get( properties, "out" ) );
 331                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, context->store );
 332                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, "meta." );
 333                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( producer ), track );
 334                         }
 335
 336                         hide = mlt_properties_get_int( context->hide_map, id );
 337                         if ( hide )
 338                                 xmlNewProp( track, "hide", hide == 1 ? "video" : ( hide == 2 ? "audio" : "both" ) );
 339                 }
 340                 serialise_service_filters( context, service, node );
 341         }
 342 }
 343
 344 static void serialise_playlist( serialise_context context, mlt_service service, xmlNode *node )
 345 {
 346         int i;
 347         xmlNode *child = node;
 348         mlt_playlist_clip_info info;
 349         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 350
 351         if ( context->pass == 0 )
 352         {
 353                 // Get a new id - if already allocated, do nothing
 354                 char *id = westley_get_id( context, service, westley_playlist );
 355                 if ( id == NULL )
 356                         return;
 357
 358                 // Iterate over the playlist entries to collect the producers
 359                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 360                 {
 361                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 362                         {
 363                                 if ( info.producer != NULL )
 364                                 {
 365                                         mlt_producer producer = mlt_producer_cut_parent( info.producer );
 366                                         char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 367                                         char *resource_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "resource" );
 368                                         if ( resource_s != NULL && !strcmp( resource_s, "<playlist>" ) )
 369                                                 serialise_playlist( context, MLT_SERVICE( producer ), node );
 370                                         else if ( service_s != NULL && strcmp( service_s, "blank" ) != 0 )
 371                                                 serialise_service( context, MLT_SERVICE( producer ), node );
 372                                 }
 373                         }
 374                 }
 375
 376                 child = xmlNewChild( node, NULL, "playlist", NULL );
 377
 378                 // Set the id
 379                 xmlNewProp( child, "id", id );
 380
 381                 // Store application specific properties
 382                 serialise_store_properties( context, properties, child, context->store );
 383                 serialise_store_properties( context, properties, child, "meta." );
 384
 385                 // Add producer to the map
 386                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 387
 388                 // Iterate over the playlist entries
 389                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 390                 {
 391                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 392                         {
 393                                 mlt_producer producer = mlt_producer_cut_parent( info.producer );
 394                                 char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 395                                 if ( service_s != NULL && strcmp( service_s, "blank" ) == 0 )
 396                                 {
 397                                         char length[ 20 ];
 398                                         length[ 19 ] = '\0';
 399                                         xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 400                                         snprintf( length, 19, "%d", info.frame_count );
 401                                         xmlNewProp( entry, "length", length );
 402                                 }
 403                                 else
 404                                 {
 405                                         char temp[ 20 ];
 406                                         xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 407                                         id = westley_get_id( context, MLT_SERVICE( producer ), westley_existing );
 408                                         xmlNewProp( entry, "producer", id );
 409                                         sprintf( temp, "%d", info.frame_in );
 410                                         xmlNewProp( entry, "in", temp );
 411                                         sprintf( temp, "%d", info.frame_out );
 412                                         xmlNewProp( entry, "out", temp );
 413                                         if ( info.repeat > 1 )
 414                                         {
 415                                                 sprintf( temp, "%d", info.repeat );
 416                                                 xmlNewProp( entry, "repeat", temp );
 417                                         }
 418                                         if ( mlt_producer_is_cut( info.cut ) )
 419                                         {
 420                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, context->store );
 421                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, "meta." );
 422                                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( info.cut ), entry );
 423                                         }
 424                                 }
 425                         }
 426                 }
 427
 428                 serialise_service_filters( context, service, child );
 429         }
 430         else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
 431         {
 432                 char *id = westley_get_id( context, service, westley_existing );
 433                 xmlNewProp( node, "producer", id );
 434         }
 435 }
 436
 437 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node )
 438 {
 439         xmlNode *child = node;
 440         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 441
 442         if ( context->pass == 0 )
 443         {
 444                 // Recurse on connected producer
 445                 serialise_service( context, mlt_service_producer( service ), node );
 446         }
 447         else
 448         {
 449                 // Get a new id - if already allocated, do nothing
 450                 char *id = westley_get_id( context, service, westley_tractor );
 451                 if ( id == NULL )
 452                         return;
 453
 454                 child = xmlNewChild( node, NULL, "tractor", NULL );
 455
 456                 // Set the id
 457                 xmlNewProp( child, "id", id );
 458                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 459                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 460
 461                 // Store application specific properties
 462                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, context->store );
 463                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, "meta." );
 464
 465                 // Recurse on connected producer
 466                 serialise_service( context, mlt_service_producer( service ), child );
 467                 serialise_service_filters( context, service, child );
 468         }
 469 }
 470
 471 static void serialise_filter( serialise_context context, mlt_service service, xmlNode *node )
 472 {
 473         xmlNode *child = node;
 474         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 475
 476         // Recurse on connected producer
 477         serialise_service( context, mlt_service_producer( service ), node );
 478
 479         if ( context->pass == 1 )
 480         {
 481                 // Get a new id - if already allocated, do nothing
 482                 char *id = westley_get_id( context, service, westley_filter );
 483                 if ( id == NULL )
 484                         return;
 485
 486                 child = xmlNewChild( node, NULL, "filter", NULL );
 487
 488                 // Set the id
 489                 xmlNewProp( child, "id", id );
 490                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 491                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 492
 493                 serialise_properties( context, properties, child );
 494                 serialise_service_filters( context, service, child );
 495         }
 496 }
 497
 498 static void serialise_transition( serialise_context context, mlt_service service, xmlNode *node )
 499 {
 500         xmlNode *child = node;
 501         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 502
 503         // Recurse on connected producer
 504         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 505
 506         if ( context->pass == 1 )
 507         {
 508                 // Get a new id - if already allocated, do nothing
 509                 char *id = westley_get_id( context, service, westley_transition );
 510                 if ( id == NULL )
 511                         return;
 512
 513                 child = xmlNewChild( node, NULL, "transition", NULL );
 514
 515                 // Set the id
 516                 xmlNewProp( child, "id", id );
 517                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 518                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 519
 520                 serialise_properties( context, properties, child );
 521                 serialise_service_filters( context, service, child );
 522         }
 523 }
 524
 525 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 526 {
 527         // Iterate over consumer/producer connections
 528         while ( service != NULL )
 529         {
 530                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 531                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 532
 533                 // Tell about the producer
 534                 if ( strcmp( mlt_type, "producer" ) == 0 )
 535                 {
 536                         char *mlt_service = mlt_properties_get( properties, "mlt_service" );
 537                         if ( mlt_properties_get( properties, "westley" ) == NULL && !strcmp( mlt_service, "tractor" ) )
 538                         {
 539                                 context->pass = 0;
 540                                 serialise_tractor( context, service, node );
 541                                 context->pass = 1;
 542                                 serialise_tractor( context, service, node );
 543                                 context->pass = 0;
 544                                 break;
 545                         }
 546                         else
 547                         {
 548                                 serialise_producer( context, service, node );
 549                         }
 550                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 551                                 break;
 552                 }
 553
 554                 // Tell about the framework container producers
 555                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 556                 {
 557                         char *resource = mlt_properties_get( properties, "resource" );
 558
 559                         // Recurse on multitrack's tracks
 560                         if ( strcmp( resource, "<multitrack>" ) == 0 )
 561                         {
 562                                 serialise_multitrack( context, service, node );
 563                                 break;
 564                         }
 565
 566                         // Recurse on playlist's clips
 567                         else if ( strcmp( resource, "<playlist>" ) == 0 )
 568                         {
 569                                 serialise_playlist( context, service, node );
 570                         }
 571
 572                         // Recurse on tractor's producer
 573                         else if ( strcmp( resource, "<tractor>" ) == 0 )
 574                         {
 575                                 context->pass = 0;
 576                                 serialise_tractor( context, service, node );
 577                                 context->pass = 1;
 578                                 serialise_tractor( context, service, node );
 579                                 context->pass = 0;
 580                                 break;
 581                         }
 582
 583                         // Treat it as a normal producer
 584                         else
 585                         {
 586                                 serialise_producer( context, service, node );
 587                         }
 588                 }
 589
 590                 // Tell about a filter
 591                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 592                 {
 593                         serialise_filter( context, service, node );
 594                         break;
 595                 }
 596
 597                 // Tell about a transition
 598                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 599                 {
 600                         serialise_transition( context, service, node );
 601                         break;
 602                 }
 603
 604                 // Get the next connected service
 605                 service = mlt_service_producer( service );
 606         }
 607 }
 608
 609 xmlDocPtr westley_make_doc( mlt_consumer consumer, mlt_service service )
 610 {
 611         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 612         xmlDocPtr doc = xmlNewDoc( "1.0" );
 613         xmlNodePtr root = xmlNewNode( NULL, "westley" );
 614         struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 615
 616         xmlDocSetRootElement( doc, root );
 617
 618         // If we have root, then deal with it now
 619         if ( mlt_properties_get( properties, "root" ) != NULL )
 620         {
 621                 xmlNewProp( root, "root", mlt_properties_get( properties, "root" ) );
 622                 context->root = strdup( mlt_properties_get( properties, "root" ) );
 623         }
 624         else
 625         {
 626                 context->root = strdup( "" );
 627         }
 628
 629         // Assign the additional 'storage' pattern for properties
 630         context->store = mlt_properties_get( MLT_CONSUMER_PROPERTIES( consumer ), "store" );
 631
 632         // Assign a title property
 633         if ( mlt_properties_get( properties, "title" ) != NULL )
 634                 xmlNewProp( root, "title", mlt_properties_get( properties, "title" ) );
 635
 636         // Construct the context maps
 637         context->id_map = mlt_properties_new();
 638         context->hide_map = mlt_properties_new();
 639
 640         // Ensure producer is a framework producer
 641         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "mlt_type", "mlt_producer" );
 642
 643         // In pass one, we serialise the end producers and playlists,
 644         // adding them to a map keyed by address.
 645         serialise_service( context, service, root );
 646
 647         // In pass two, we serialise the tractor and reference the
 648         // producers and playlists
 649         context->pass++;
 650         serialise_service( context, service, root );
 651
 652         // Cleanup resource
 653         mlt_properties_close( context->id_map );
 654         mlt_properties_close( context->hide_map );
 655         free( context->root );
 656         free( context );
 657
 658         return doc;
 659 }
 660
 661 static int consumer_start( mlt_consumer this )
 662 {
 663         xmlDocPtr doc = NULL;
 664
 665         // Get the producer service
 666         mlt_service service = mlt_service_producer( MLT_CONSUMER_SERVICE( this ) );
 667         if ( service != NULL )
 668         {
 669                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 670                 char *resource =  mlt_properties_get( properties, "resource" );
 671
 672                 // Set the title if provided
 673                 if ( mlt_properties_get( properties, "title" ) )
 674                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", mlt_properties_get( properties, "title" ) );
 675                 else if ( mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "title" ) == NULL )
 676                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", "Anonymous Submission" );
 677
 678                 // Check for a root on the consumer properties and pass to service
 679                 if ( mlt_properties_get( properties, "root" ) )
 680                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", mlt_properties_get( properties, "root" ) );
 681
 682                 // Specify roots in other cases...
 683                 if ( resource != NULL && mlt_properties_get( properties, "root" ) == NULL )
 684                 {
 685                         // Get the current working directory
 686                         char *cwd = getcwd( NULL, 0 );
 687                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", cwd );
 688                         free( cwd );
 689                 }
 690
 691                 // Make the document
 692                 doc = westley_make_doc( this, service );
 693
 694                 // Handle the output
 695                 if ( resource == NULL || !strcmp( resource, "" ) )
 696                 {
 697                         xmlDocFormatDump( stdout, doc, 1 );
 698                 }
 699                 else if ( strchr( resource, '.' ) == NULL )
 700                 {
 701                         xmlChar *buffer = NULL;
 702                         int length = 0;
 703                         xmlDocDumpMemoryEnc( doc, &buffer, &length, "utf-8" );
 704                         mlt_properties_set( properties, resource, buffer );
 705                         xmlFree( buffer );
 706                 }
 707                 else
 708                 {
 709                         xmlSaveFormatFileEnc( resource, doc, "utf-8", 1 );
 710                 }
 711
 712                 // Close the document
 713                 xmlFreeDoc( doc );
 714         }
 715
 716         mlt_consumer_stop( this );
 717
 718         mlt_consumer_stopped( this );
 719
 720         return 0;
 721 }
 722
 723 static int consumer_is_stopped( mlt_consumer this )
 724 {
 725         return 1;
 726 }