git.sesse.net Git - mlt/blob - src/modules/xml/consumer_xml.c

   1 /*
   2  * consumer_xml.c -- a libxml2 serialiser of mlt service networks
   3  * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <libxml/tree.h>
  27
  28 #define ID_SIZE 128
  29
  30 #define _x (const xmlChar*)
  31 #define _s (const char*)
  32
  33 // This maintains counters for adding ids to elements
  34 struct serialise_context_s
  35 {
  36         mlt_properties id_map;
  37         int producer_count;
  38         int multitrack_count;
  39         int playlist_count;
  40         int tractor_count;
  41         int filter_count;
  42         int transition_count;
  43         int pass;
  44         mlt_properties hide_map;
  45         char *root;
  46         char *store;
  47 };
  48 typedef struct serialise_context_s* serialise_context;
  49
  50 /** Forward references to static functions.
  51 */
  52
  53 static int consumer_start( mlt_consumer parent );
  54 static int consumer_is_stopped( mlt_consumer this );
  55 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node );
  56
  57 typedef enum
  58 {
  59         xml_existing,
  60         xml_producer,
  61         xml_multitrack,
  62         xml_playlist,
  63         xml_tractor,
  64         xml_filter,
  65         xml_transition
  66 }
  67 xml_type;
  68
  69 /** Create or retrieve an id associated to this service.
  70 */
  71
  72 static char *xml_get_id( serialise_context context, mlt_service service, xml_type type )
  73 {
  74         char *id = NULL;
  75         int i = 0;
  76         mlt_properties map = context->id_map;
  77
  78         // Search the map for the service
  79         for ( i = 0; i < mlt_properties_count( map ); i ++ )
  80                 if ( mlt_properties_get_data_at( map, i, NULL ) == service )
  81                         break;
  82
  83         // If the service is not in the map, and the type indicates a new id is needed...
  84         if ( i >= mlt_properties_count( map ) && type != xml_existing )
  85         {
  86                 // Attempt to reuse existing id
  87                 id = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "id" );
  88
  89                 // If no id, or the id is used in the map (for another service), then
  90                 // create a new one.
  91                 if ( id == NULL || mlt_properties_get_data( map, id, NULL ) != NULL )
  92                 {
  93                         char temp[ ID_SIZE ];
  94                         do
  95                         {
  96                                 switch( type )
  97                                 {
  98                                         case xml_producer:
  99                                                 sprintf( temp, "producer%d", context->producer_count ++ );
 100                                                 break;
 101                                         case xml_multitrack:
 102                                                 sprintf( temp, "multitrack%d", context->multitrack_count ++ );
 103                                                 break;
 104                                         case xml_playlist:
 105                                                 sprintf( temp, "playlist%d", context->playlist_count ++ );
 106                                                 break;
 107                                         case xml_tractor:
 108                                                 sprintf( temp, "tractor%d", context->tractor_count ++ );
 109                                                 break;
 110                                         case xml_filter:
 111                                                 sprintf( temp, "filter%d", context->filter_count ++ );
 112                                                 break;
 113                                         case xml_transition:
 114                                                 sprintf( temp, "transition%d", context->transition_count ++ );
 115                                                 break;
 116                                         case xml_existing:
 117                                                 // Never gets here
 118                                                 break;
 119                                 }
 120                         }
 121                         while( mlt_properties_get_data( map, temp, NULL ) != NULL );
 122
 123                         // Set the data at the generated name
 124                         mlt_properties_set_data( map, temp, service, 0, NULL, NULL );
 125
 126                         // Get the pointer to the name (i is the end of the list)
 127                         id = mlt_properties_get_name( map, i );
 128                 }
 129                 else
 130                 {
 131                         // Store the existing id in the map
 132                         mlt_properties_set_data( map, id, service, 0, NULL, NULL );
 133                 }
 134         }
 135         else if ( type == xml_existing )
 136         {
 137                 id = mlt_properties_get_name( map, i );
 138         }
 139
 140         return id;
 141 }
 142
 143 /** This is what will be called by the factory - anything can be passed in
 144         via the argument, but keep it simple.
 145 */
 146
 147 mlt_consumer consumer_xml_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 148 {
 149         // Create the consumer object
 150         mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
 151
 152         // If no malloc'd and consumer init ok
 153         if ( this != NULL && mlt_consumer_init( this, NULL, profile ) == 0 )
 154         {
 155                 // Allow thread to be started/stopped
 156                 this->start = consumer_start;
 157                 this->is_stopped = consumer_is_stopped;
 158
 159                 mlt_properties_set( MLT_CONSUMER_PROPERTIES( this ), "resource", arg );
 160
 161                 // Return the consumer produced
 162                 return this;
 163         }
 164
 165         // malloc or consumer init failed
 166         free( this );
 167
 168         // Indicate failure
 169         return NULL;
 170 }
 171
 172 static void serialise_properties( serialise_context context, mlt_properties properties, xmlNode *node )
 173 {
 174         int i;
 175         xmlNode *p;
 176
 177         // Enumerate the properties
 178         for ( i = 0; i < mlt_properties_count( properties ); i++ )
 179         {
 180                 char *name = mlt_properties_get_name( properties, i );
 181                 if ( name != NULL &&
 182                          name[ 0 ] != '_' &&
 183                          mlt_properties_get_value( properties, i ) != NULL &&
 184                          strcmp( name, "mlt" ) != 0 &&
 185                          strcmp( name, "in" ) != 0 &&
 186                          strcmp( name, "out" ) != 0 &&
 187                          strcmp( name, "id" ) != 0 &&
 188                          strcmp( name, "title" ) != 0 &&
 189                          strcmp( name, "root" ) != 0 &&
 190                          strcmp( name, "width" ) != 0 &&
 191                          strcmp( name, "height" ) != 0 )
 192                 {
 193                         char *value = mlt_properties_get_value( properties, i );
 194                         int rootlen = strlen( context->root );
 195                         if ( rootlen && !strncmp( value, context->root, rootlen ) && value[ rootlen ] == '/' )
 196                                 value += rootlen + 1;
 197                         p = xmlNewTextChild( node, NULL, _x("property"), _x(value) );
 198                         xmlNewProp( p, _x("name"), _x(name) );
 199                 }
 200         }
 201 }
 202
 203 static void serialise_store_properties( serialise_context context, mlt_properties properties, xmlNode *node, const char *store )
 204 {
 205         int i;
 206         xmlNode *p;
 207
 208         // Enumerate the properties
 209         for ( i = 0; store != NULL && i < mlt_properties_count( properties ); i++ )
 210         {
 211                 char *name = mlt_properties_get_name( properties, i );
 212                 if ( !strncmp( name, store, strlen( store ) ) )
 213                 {
 214                         char *value = mlt_properties_get_value( properties, i );
 215                         if ( value != NULL )
 216                         {
 217                                 int rootlen = strlen( context->root );
 218                                 if ( rootlen && !strncmp( value, context->root, rootlen ) && value[ rootlen ] == '/' )
 219                                         value += rootlen + 1;
 220                                 p = xmlNewTextChild( node, NULL, _x("property"), _x(value) );
 221                                 xmlNewProp( p, _x("name"), _x(name) );
 222                         }
 223                 }
 224         }
 225 }
 226
 227 static inline void serialise_service_filters( serialise_context context, mlt_service service, xmlNode *node )
 228 {
 229         int i;
 230         xmlNode *p;
 231         mlt_filter filter = NULL;
 232
 233         // Enumerate the filters
 234         for ( i = 0; ( filter = mlt_producer_filter( MLT_PRODUCER( service ), i ) ) != NULL; i ++ )
 235         {
 236                 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 237                 if ( mlt_properties_get_int( properties, "_loader" ) == 0 )
 238                 {
 239                         // Get a new id - if already allocated, do nothing
 240                         char *id = xml_get_id( context, MLT_FILTER_SERVICE( filter ), xml_filter );
 241                         if ( id != NULL )
 242                         {
 243                                 int in = mlt_properties_get_position( properties, "in" );
 244                                 int out = mlt_properties_get_position( properties, "out" );
 245                                 p = xmlNewChild( node, NULL, _x("filter"), NULL );
 246                                 xmlNewProp( p, _x("id"), _x(id) );
 247                                 if ( mlt_properties_get( properties, "title" ) )
 248                                         xmlNewProp( p, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 249                                 if ( in != 0 || out != 0 )
 250                                 {
 251                                         char temp[ 20 ];
 252                                         sprintf( temp, "%d", in );
 253                                         xmlNewProp( p, _x("in"), _x(temp) );
 254                                         sprintf( temp, "%d", out );
 255                                         xmlNewProp( p, _x("out"), _x(temp) );
 256                                 }
 257                                 serialise_properties( context, properties, p );
 258                                 serialise_service_filters( context, MLT_FILTER_SERVICE( filter ), p );
 259                         }
 260                 }
 261         }
 262 }
 263
 264 static void serialise_producer( serialise_context context, mlt_service service, xmlNode *node )
 265 {
 266         xmlNode *child = node;
 267         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service ) ) );
 268
 269         if ( context->pass == 0 )
 270         {
 271                 mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
 272                 // Get a new id - if already allocated, do nothing
 273                 char *id = xml_get_id( context, parent, xml_producer );
 274                 if ( id == NULL )
 275                         return;
 276
 277                 child = xmlNewChild( node, NULL, _x("producer"), NULL );
 278
 279                 // Set the id
 280                 xmlNewProp( child, _x("id"), _x(id) );
 281                 if ( mlt_properties_get( properties, "title" ) )
 282                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 283                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 284                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 285                 serialise_properties( context, properties, child );
 286                 serialise_service_filters( context, service, child );
 287
 288                 // Add producer to the map
 289                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 290         }
 291         else
 292         {
 293                 char *id = xml_get_id( context, parent, xml_existing );
 294                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 295                 xmlNewProp( node, _x("parent"), _x(id) );
 296                 xmlNewProp( node, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 297                 xmlNewProp( node, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 298         }
 299 }
 300
 301 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node );
 302
 303 static void serialise_multitrack( serialise_context context, mlt_service service, xmlNode *node )
 304 {
 305         int i;
 306
 307         if ( context->pass == 0 )
 308         {
 309                 // Iterate over the tracks to collect the producers
 310                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 311                 {
 312                         mlt_producer producer = mlt_producer_cut_parent( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) );
 313                         serialise_service( context, MLT_SERVICE( producer ), node );
 314                 }
 315         }
 316         else
 317         {
 318                 // Get a new id - if already allocated, do nothing
 319                 char *id = xml_get_id( context, service, xml_multitrack );
 320                 if ( id == NULL )
 321                         return;
 322
 323                 // Serialise the tracks
 324                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 325                 {
 326                         xmlNode *track = xmlNewChild( node, NULL, _x("track"), NULL );
 327                         int hide = 0;
 328                         mlt_producer producer = mlt_multitrack_track( MLT_MULTITRACK( service ), i );
 329                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 330
 331                         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( producer ) );
 332
 333                         char *id = xml_get_id( context, MLT_SERVICE( parent ), xml_existing );
 334                         xmlNewProp( track, _x("producer"), _x(id) );
 335                         if ( mlt_producer_is_cut( producer ) )
 336                         {
 337                                 xmlNewProp( track, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 338                                 xmlNewProp( track, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 339                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, context->store );
 340                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, "meta." );
 341                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( producer ), track );
 342                         }
 343
 344                         hide = mlt_properties_get_int( context->hide_map, id );
 345                         if ( hide )
 346                                 xmlNewProp( track, _x("hide"), _x( hide == 1 ? "video" : ( hide == 2 ? "audio" : "both" ) ) );
 347                 }
 348                 serialise_service_filters( context, service, node );
 349         }
 350 }
 351
 352 static void serialise_playlist( serialise_context context, mlt_service service, xmlNode *node )
 353 {
 354         int i;
 355         xmlNode *child = node;
 356         mlt_playlist_clip_info info;
 357         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 358
 359         if ( context->pass == 0 )
 360         {
 361                 // Get a new id - if already allocated, do nothing
 362                 char *id = xml_get_id( context, service, xml_playlist );
 363                 if ( id == NULL )
 364                         return;
 365
 366                 // Iterate over the playlist entries to collect the producers
 367                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 368                 {
 369                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 370                         {
 371                                 if ( info.producer != NULL )
 372                                 {
 373                                         mlt_producer producer = mlt_producer_cut_parent( info.producer );
 374                                         char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 375                                         char *resource_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "resource" );
 376                                         if ( resource_s != NULL && !strcmp( resource_s, "<playlist>" ) )
 377                                                 serialise_playlist( context, MLT_SERVICE( producer ), node );
 378                                         else if ( service_s != NULL && strcmp( service_s, "blank" ) != 0 )
 379                                                 serialise_service( context, MLT_SERVICE( producer ), node );
 380                                 }
 381                         }
 382                 }
 383
 384                 child = xmlNewChild( node, NULL, _x("playlist"), NULL );
 385
 386                 // Set the id
 387                 xmlNewProp( child, _x("id"), _x(id) );
 388                 if ( mlt_properties_get( properties, "title" ) )
 389                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 390
 391                 // Store application specific properties
 392                 serialise_store_properties( context, properties, child, context->store );
 393                 serialise_store_properties( context, properties, child, "meta." );
 394
 395                 // Add producer to the map
 396                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 397
 398                 // Iterate over the playlist entries
 399                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 400                 {
 401                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 402                         {
 403                                 mlt_producer producer = mlt_producer_cut_parent( info.producer );
 404                                 char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 405                                 if ( service_s != NULL && strcmp( service_s, "blank" ) == 0 )
 406                                 {
 407                                         char length[ 20 ];
 408                                         length[ 19 ] = '\0';
 409                                         xmlNode *entry = xmlNewChild( child, NULL, _x("blank"), NULL );
 410                                         snprintf( length, 19, "%d", (int)info.frame_count );
 411                                         xmlNewProp( entry, _x("length"), _x(length) );
 412                                 }
 413                                 else
 414                                 {
 415                                         char temp[ 20 ];
 416                                         xmlNode *entry = xmlNewChild( child, NULL, _x("entry"), NULL );
 417                                         id = xml_get_id( context, MLT_SERVICE( producer ), xml_existing );
 418                                         xmlNewProp( entry, _x("producer"), _x(id) );
 419                                         sprintf( temp, "%d", (int)info.frame_in );
 420                                         xmlNewProp( entry, _x("in"), _x(temp) );
 421                                         sprintf( temp, "%d", (int)info.frame_out );
 422                                         xmlNewProp( entry, _x("out"), _x(temp) );
 423                                         if ( info.repeat > 1 )
 424                                         {
 425                                                 sprintf( temp, "%d", info.repeat );
 426                                                 xmlNewProp( entry, _x("repeat"), _x(temp) );
 427                                         }
 428                                         if ( mlt_producer_is_cut( info.cut ) )
 429                                         {
 430                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, context->store );
 431                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, "meta." );
 432                                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( info.cut ), entry );
 433                                         }
 434                                 }
 435                         }
 436                 }
 437
 438                 serialise_service_filters( context, service, child );
 439         }
 440         else if ( xmlStrcmp( node->name, _x("tractor") ) != 0 )
 441         {
 442                 char *id = xml_get_id( context, service, xml_existing );
 443                 xmlNewProp( node, _x("producer"), _x(id) );
 444         }
 445 }
 446
 447 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node )
 448 {
 449         xmlNode *child = node;
 450         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 451
 452         if ( context->pass == 0 )
 453         {
 454                 // Recurse on connected producer
 455                 serialise_service( context, mlt_service_producer( service ), node );
 456         }
 457         else
 458         {
 459                 // Get a new id - if already allocated, do nothing
 460                 char *id = xml_get_id( context, service, xml_tractor );
 461                 if ( id == NULL )
 462                         return;
 463
 464                 child = xmlNewChild( node, NULL, _x("tractor"), NULL );
 465
 466                 // Set the id
 467                 xmlNewProp( child, _x("id"), _x(id) );
 468                 if ( mlt_properties_get( properties, "title" ) )
 469                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 470                 if ( mlt_properties_get( properties, "global_feed" ) )
 471                         xmlNewProp( child, _x("global_feed"), _x(mlt_properties_get( properties, "global_feed" )) );
 472                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 473                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 474
 475                 // Store application specific properties
 476                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, context->store );
 477                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, "meta." );
 478
 479                 // Recurse on connected producer
 480                 serialise_service( context, mlt_service_producer( service ), child );
 481                 serialise_service_filters( context, service, child );
 482         }
 483 }
 484
 485 static void serialise_filter( serialise_context context, mlt_service service, xmlNode *node )
 486 {
 487         xmlNode *child = node;
 488         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 489
 490         // Recurse on connected producer
 491         serialise_service( context, mlt_service_producer( service ), node );
 492
 493         if ( context->pass == 1 )
 494         {
 495                 // Get a new id - if already allocated, do nothing
 496                 char *id = xml_get_id( context, service, xml_filter );
 497                 if ( id == NULL )
 498                         return;
 499
 500                 child = xmlNewChild( node, NULL, _x("filter"), NULL );
 501
 502                 // Set the id
 503                 xmlNewProp( child, _x("id"), _x(id) );
 504                 if ( mlt_properties_get( properties, "title" ) )
 505                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 506                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 507                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 508
 509                 serialise_properties( context, properties, child );
 510                 serialise_service_filters( context, service, child );
 511         }
 512 }
 513
 514 static void serialise_transition( serialise_context context, mlt_service service, xmlNode *node )
 515 {
 516         xmlNode *child = node;
 517         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 518
 519         // Recurse on connected producer
 520         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 521
 522         if ( context->pass == 1 )
 523         {
 524                 // Get a new id - if already allocated, do nothing
 525                 char *id = xml_get_id( context, service, xml_transition );
 526                 if ( id == NULL )
 527                         return;
 528
 529                 child = xmlNewChild( node, NULL, _x("transition"), NULL );
 530
 531                 // Set the id
 532                 xmlNewProp( child, _x("id"), _x(id) );
 533                 if ( mlt_properties_get( properties, "title" ) )
 534                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 535                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 536                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 537
 538                 serialise_properties( context, properties, child );
 539                 serialise_service_filters( context, service, child );
 540         }
 541 }
 542
 543 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 544 {
 545         // Iterate over consumer/producer connections
 546         while ( service != NULL )
 547         {
 548                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 549                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 550
 551                 // Tell about the producer
 552                 if ( strcmp( mlt_type, "producer" ) == 0 )
 553                 {
 554                         char *mlt_service = mlt_properties_get( properties, "mlt_service" );
 555                         if ( mlt_properties_get( properties, "xml" ) == NULL && ( mlt_service != NULL && !strcmp( mlt_service, "tractor" ) ) )
 556                         {
 557                                 context->pass = 0;
 558                                 serialise_tractor( context, service, node );
 559                                 context->pass = 1;
 560                                 serialise_tractor( context, service, node );
 561                                 context->pass = 0;
 562                                 break;
 563                         }
 564                         else
 565                         {
 566                                 serialise_producer( context, service, node );
 567                         }
 568                         if ( mlt_properties_get( properties, "xml" ) != NULL )
 569                                 break;
 570                 }
 571
 572                 // Tell about the framework container producers
 573                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 574                 {
 575                         char *resource = mlt_properties_get( properties, "resource" );
 576
 577                         // Recurse on multitrack's tracks
 578                         if ( strcmp( resource, "<multitrack>" ) == 0 )
 579                         {
 580                                 serialise_multitrack( context, service, node );
 581                                 break;
 582                         }
 583
 584                         // Recurse on playlist's clips
 585                         else if ( strcmp( resource, "<playlist>" ) == 0 )
 586                         {
 587                                 serialise_playlist( context, service, node );
 588                         }
 589
 590                         // Recurse on tractor's producer
 591                         else if ( strcmp( resource, "<tractor>" ) == 0 )
 592                         {
 593                                 context->pass = 0;
 594                                 serialise_tractor( context, service, node );
 595                                 context->pass = 1;
 596                                 serialise_tractor( context, service, node );
 597                                 context->pass = 0;
 598                                 break;
 599                         }
 600
 601                         // Treat it as a normal producer
 602                         else
 603                         {
 604                                 serialise_producer( context, service, node );
 605                         }
 606                 }
 607
 608                 // Tell about a filter
 609                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 610                 {
 611                         serialise_filter( context, service, node );
 612                         break;
 613                 }
 614
 615                 // Tell about a transition
 616                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 617                 {
 618                         serialise_transition( context, service, node );
 619                         break;
 620                 }
 621
 622                 // Get the next connected service
 623                 service = mlt_service_producer( service );
 624         }
 625 }
 626
 627 xmlDocPtr xml_make_doc( mlt_consumer consumer, mlt_service service )
 628 {
 629         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 630         xmlDocPtr doc = xmlNewDoc( _x("1.0") );
 631         xmlNodePtr root = xmlNewNode( NULL, _x("mlt") );
 632         struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 633
 634         xmlDocSetRootElement( doc, root );
 635
 636         // If we have root, then deal with it now
 637         if ( mlt_properties_get( properties, "root" ) != NULL )
 638         {
 639                 xmlNewProp( root, _x("root"), _x(mlt_properties_get( properties, "root" )) );
 640                 context->root = strdup( mlt_properties_get( properties, "root" ) );
 641         }
 642         else
 643         {
 644                 context->root = strdup( "" );
 645         }
 646
 647         // Assign the additional 'storage' pattern for properties
 648         context->store = mlt_properties_get( MLT_CONSUMER_PROPERTIES( consumer ), "store" );
 649
 650         // Assign a title property
 651         if ( mlt_properties_get( properties, "title" ) != NULL )
 652                 xmlNewProp( root, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 653         mlt_properties_set_int( properties, "global_feed", 1 );
 654
 655         // Construct the context maps
 656         context->id_map = mlt_properties_new();
 657         context->hide_map = mlt_properties_new();
 658
 659         // Ensure producer is a framework producer
 660         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "mlt_type", "mlt_producer" );
 661
 662         // In pass one, we serialise the end producers and playlists,
 663         // adding them to a map keyed by address.
 664         serialise_service( context, service, root );
 665
 666         // In pass two, we serialise the tractor and reference the
 667         // producers and playlists
 668         context->pass++;
 669         serialise_service( context, service, root );
 670
 671         // Cleanup resource
 672         mlt_properties_close( context->id_map );
 673         mlt_properties_close( context->hide_map );
 674         free( context->root );
 675         free( context );
 676
 677         return doc;
 678 }
 679
 680 static int consumer_start( mlt_consumer this )
 681 {
 682         xmlDocPtr doc = NULL;
 683
 684         // Get the producer service
 685         mlt_service service = mlt_service_producer( MLT_CONSUMER_SERVICE( this ) );
 686         if ( service != NULL )
 687         {
 688                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 689                 char *resource =  mlt_properties_get( properties, "resource" );
 690
 691                 // Set the title if provided
 692                 if ( mlt_properties_get( properties, "title" ) )
 693                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", mlt_properties_get( properties, "title" ) );
 694                 else if ( mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "title" ) == NULL )
 695                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", "Anonymous Submission" );
 696
 697                 // Check for a root on the consumer properties and pass to service
 698                 if ( mlt_properties_get( properties, "root" ) )
 699                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", mlt_properties_get( properties, "root" ) );
 700
 701                 // Specify roots in other cases...
 702                 if ( resource != NULL && mlt_properties_get( properties, "root" ) == NULL )
 703                 {
 704                         // Get the current working directory
 705                         char *cwd = getcwd( NULL, 0 );
 706                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", cwd );
 707                         free( cwd );
 708                 }
 709
 710                 // Make the document
 711                 doc = xml_make_doc( this, service );
 712
 713                 // Handle the output
 714                 if ( resource == NULL || !strcmp( resource, "" ) )
 715                 {
 716                         xmlDocFormatDump( stdout, doc, 1 );
 717                 }
 718                 else if ( strchr( resource, '.' ) == NULL )
 719                 {
 720                         xmlChar *buffer = NULL;
 721                         int length = 0;
 722                         xmlDocDumpMemoryEnc( doc, &buffer, &length, "utf-8" );
 723                         mlt_properties_set( properties, resource, _s(buffer) );
 724                         xmlFree( buffer );
 725                 }
 726                 else
 727                 {
 728                         xmlSaveFormatFileEnc( resource, doc, "utf-8", 1 );
 729                 }
 730
 731                 // Close the document
 732                 xmlFreeDoc( doc );
 733         }
 734
 735         mlt_consumer_stop( this );
 736
 737         mlt_consumer_stopped( this );
 738
 739         return 0;
 740 }
 741
 742 static int consumer_is_stopped( mlt_consumer this )
 743 {
 744         return 1;
 745 }