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                         if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 195                                 value += strlen( context->root ) + 1;
 196                         p = xmlNewTextChild( node, NULL, _x("property"), _x(value) );
 197                         xmlNewProp( p, _x("name"), _x(name) );
 198                 }
 199         }
 200 }
 201
 202 static void serialise_store_properties( serialise_context context, mlt_properties properties, xmlNode *node, const char *store )
 203 {
 204         int i;
 205         xmlNode *p;
 206
 207         // Enumerate the properties
 208         for ( i = 0; store != NULL && i < mlt_properties_count( properties ); i++ )
 209         {
 210                 char *name = mlt_properties_get_name( properties, i );
 211                 if ( !strncmp( name, store, strlen( store ) ) )
 212                 {
 213                         char *value = mlt_properties_get_value( properties, i );
 214                         if ( value != NULL )
 215                         {
 216                                 if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 217                                         value += strlen( context->root ) + 1;
 218                                 p = xmlNewTextChild( node, NULL, _x("property"), _x(value) );
 219                                 xmlNewProp( p, _x("name"), _x(name) );
 220                         }
 221                 }
 222         }
 223 }
 224
 225 static inline void serialise_service_filters( serialise_context context, mlt_service service, xmlNode *node )
 226 {
 227         int i;
 228         xmlNode *p;
 229         mlt_filter filter = NULL;
 230
 231         // Enumerate the filters
 232         for ( i = 0; ( filter = mlt_producer_filter( MLT_PRODUCER( service ), i ) ) != NULL; i ++ )
 233         {
 234                 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 235                 if ( mlt_properties_get_int( properties, "_loader" ) == 0 )
 236                 {
 237                         // Get a new id - if already allocated, do nothing
 238                         char *id = xml_get_id( context, MLT_FILTER_SERVICE( filter ), xml_filter );
 239                         if ( id != NULL )
 240                         {
 241                                 int in = mlt_properties_get_position( properties, "in" );
 242                                 int out = mlt_properties_get_position( properties, "out" );
 243                                 p = xmlNewChild( node, NULL, _x("filter"), NULL );
 244                                 xmlNewProp( p, _x("id"), _x(id) );
 245                                 if ( mlt_properties_get( properties, "title" ) )
 246                                         xmlNewProp( p, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 247                                 if ( in != 0 || out != 0 )
 248                                 {
 249                                         char temp[ 20 ];
 250                                         sprintf( temp, "%d", in );
 251                                         xmlNewProp( p, _x("in"), _x(temp) );
 252                                         sprintf( temp, "%d", out );
 253                                         xmlNewProp( p, _x("out"), _x(temp) );
 254                                 }
 255                                 serialise_properties( context, properties, p );
 256                                 serialise_service_filters( context, MLT_FILTER_SERVICE( filter ), p );
 257                         }
 258                 }
 259         }
 260 }
 261
 262 static void serialise_producer( serialise_context context, mlt_service service, xmlNode *node )
 263 {
 264         xmlNode *child = node;
 265         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service ) ) );
 266
 267         if ( context->pass == 0 )
 268         {
 269                 mlt_properties properties = MLT_SERVICE_PROPERTIES( parent );
 270                 // Get a new id - if already allocated, do nothing
 271                 char *id = xml_get_id( context, parent, xml_producer );
 272                 if ( id == NULL )
 273                         return;
 274
 275                 child = xmlNewChild( node, NULL, _x("producer"), NULL );
 276
 277                 // Set the id
 278                 xmlNewProp( child, _x("id"), _x(id) );
 279                 if ( mlt_properties_get( properties, "title" ) )
 280                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 281                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 282                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 283                 serialise_properties( context, properties, child );
 284                 serialise_service_filters( context, service, child );
 285
 286                 // Add producer to the map
 287                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 288         }
 289         else
 290         {
 291                 char *id = xml_get_id( context, parent, xml_existing );
 292                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 293                 xmlNewProp( node, _x("parent"), _x(id) );
 294                 xmlNewProp( node, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 295                 xmlNewProp( node, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 296         }
 297 }
 298
 299 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node );
 300
 301 static void serialise_multitrack( serialise_context context, mlt_service service, xmlNode *node )
 302 {
 303         int i;
 304
 305         if ( context->pass == 0 )
 306         {
 307                 // Iterate over the tracks to collect the producers
 308                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 309                 {
 310                         mlt_producer producer = mlt_producer_cut_parent( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) );
 311                         serialise_service( context, MLT_SERVICE( producer ), node );
 312                 }
 313         }
 314         else
 315         {
 316                 // Get a new id - if already allocated, do nothing
 317                 char *id = xml_get_id( context, service, xml_multitrack );
 318                 if ( id == NULL )
 319                         return;
 320
 321                 // Serialise the tracks
 322                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 323                 {
 324                         xmlNode *track = xmlNewChild( node, NULL, _x("track"), NULL );
 325                         int hide = 0;
 326                         mlt_producer producer = mlt_multitrack_track( MLT_MULTITRACK( service ), i );
 327                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 328
 329                         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( producer ) );
 330
 331                         char *id = xml_get_id( context, MLT_SERVICE( parent ), xml_existing );
 332                         xmlNewProp( track, _x("producer"), _x(id) );
 333                         if ( mlt_producer_is_cut( producer ) )
 334                         {
 335                                 xmlNewProp( track, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 336                                 xmlNewProp( track, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 337                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, context->store );
 338                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( producer ), track, "meta." );
 339                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( producer ), track );
 340                         }
 341
 342                         hide = mlt_properties_get_int( context->hide_map, id );
 343                         if ( hide )
 344                                 xmlNewProp( track, _x("hide"), _x( hide == 1 ? "video" : ( hide == 2 ? "audio" : "both" ) ) );
 345                 }
 346                 serialise_service_filters( context, service, node );
 347         }
 348 }
 349
 350 static void serialise_playlist( serialise_context context, mlt_service service, xmlNode *node )
 351 {
 352         int i;
 353         xmlNode *child = node;
 354         mlt_playlist_clip_info info;
 355         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 356
 357         if ( context->pass == 0 )
 358         {
 359                 // Get a new id - if already allocated, do nothing
 360                 char *id = xml_get_id( context, service, xml_playlist );
 361                 if ( id == NULL )
 362                         return;
 363
 364                 // Iterate over the playlist entries to collect the producers
 365                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 366                 {
 367                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 368                         {
 369                                 if ( info.producer != NULL )
 370                                 {
 371                                         mlt_producer producer = mlt_producer_cut_parent( info.producer );
 372                                         char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 373                                         char *resource_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "resource" );
 374                                         if ( resource_s != NULL && !strcmp( resource_s, "<playlist>" ) )
 375                                                 serialise_playlist( context, MLT_SERVICE( producer ), node );
 376                                         else if ( service_s != NULL && strcmp( service_s, "blank" ) != 0 )
 377                                                 serialise_service( context, MLT_SERVICE( producer ), node );
 378                                 }
 379                         }
 380                 }
 381
 382                 child = xmlNewChild( node, NULL, _x("playlist"), NULL );
 383
 384                 // Set the id
 385                 xmlNewProp( child, _x("id"), _x(id) );
 386                 if ( mlt_properties_get( properties, "title" ) )
 387                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 388
 389                 // Store application specific properties
 390                 serialise_store_properties( context, properties, child, context->store );
 391                 serialise_store_properties( context, properties, child, "meta." );
 392
 393                 // Add producer to the map
 394                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 395
 396                 // Iterate over the playlist entries
 397                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 398                 {
 399                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 400                         {
 401                                 mlt_producer producer = mlt_producer_cut_parent( info.producer );
 402                                 char *service_s = mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "mlt_service" );
 403                                 if ( service_s != NULL && strcmp( service_s, "blank" ) == 0 )
 404                                 {
 405                                         char length[ 20 ];
 406                                         length[ 19 ] = '\0';
 407                                         xmlNode *entry = xmlNewChild( child, NULL, _x("blank"), NULL );
 408                                         snprintf( length, 19, "%d", (int)info.frame_count );
 409                                         xmlNewProp( entry, _x("length"), _x(length) );
 410                                 }
 411                                 else
 412                                 {
 413                                         char temp[ 20 ];
 414                                         xmlNode *entry = xmlNewChild( child, NULL, _x("entry"), NULL );
 415                                         id = xml_get_id( context, MLT_SERVICE( producer ), xml_existing );
 416                                         xmlNewProp( entry, _x("producer"), _x(id) );
 417                                         sprintf( temp, "%d", (int)info.frame_in );
 418                                         xmlNewProp( entry, _x("in"), _x(temp) );
 419                                         sprintf( temp, "%d", (int)info.frame_out );
 420                                         xmlNewProp( entry, _x("out"), _x(temp) );
 421                                         if ( info.repeat > 1 )
 422                                         {
 423                                                 sprintf( temp, "%d", info.repeat );
 424                                                 xmlNewProp( entry, _x("repeat"), _x(temp) );
 425                                         }
 426                                         if ( mlt_producer_is_cut( info.cut ) )
 427                                         {
 428                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, context->store );
 429                                                 serialise_store_properties( context, MLT_PRODUCER_PROPERTIES( info.cut ), entry, "meta." );
 430                                                 serialise_service_filters( context, MLT_PRODUCER_SERVICE( info.cut ), entry );
 431                                         }
 432                                 }
 433                         }
 434                 }
 435
 436                 serialise_service_filters( context, service, child );
 437         }
 438         else if ( xmlStrcmp( node->name, _x("tractor") ) != 0 )
 439         {
 440                 char *id = xml_get_id( context, service, xml_existing );
 441                 xmlNewProp( node, _x("producer"), _x(id) );
 442         }
 443 }
 444
 445 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node )
 446 {
 447         xmlNode *child = node;
 448         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 449
 450         if ( context->pass == 0 )
 451         {
 452                 // Recurse on connected producer
 453                 serialise_service( context, mlt_service_producer( service ), node );
 454         }
 455         else
 456         {
 457                 // Get a new id - if already allocated, do nothing
 458                 char *id = xml_get_id( context, service, xml_tractor );
 459                 if ( id == NULL )
 460                         return;
 461
 462                 child = xmlNewChild( node, NULL, _x("tractor"), NULL );
 463
 464                 // Set the id
 465                 xmlNewProp( child, _x("id"), _x(id) );
 466                 if ( mlt_properties_get( properties, "title" ) )
 467                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 468                 if ( mlt_properties_get( properties, "global_feed" ) )
 469                         xmlNewProp( child, _x("global_feed"), _x(mlt_properties_get( properties, "global_feed" )) );
 470                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 471                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 472
 473                 // Store application specific properties
 474                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, context->store );
 475                 serialise_store_properties( context, MLT_SERVICE_PROPERTIES( service ), child, "meta." );
 476
 477                 // Recurse on connected producer
 478                 serialise_service( context, mlt_service_producer( service ), child );
 479                 serialise_service_filters( context, service, child );
 480         }
 481 }
 482
 483 static void serialise_filter( serialise_context context, mlt_service service, xmlNode *node )
 484 {
 485         xmlNode *child = node;
 486         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 487
 488         // Recurse on connected producer
 489         serialise_service( context, mlt_service_producer( service ), node );
 490
 491         if ( context->pass == 1 )
 492         {
 493                 // Get a new id - if already allocated, do nothing
 494                 char *id = xml_get_id( context, service, xml_filter );
 495                 if ( id == NULL )
 496                         return;
 497
 498                 child = xmlNewChild( node, NULL, _x("filter"), NULL );
 499
 500                 // Set the id
 501                 xmlNewProp( child, _x("id"), _x(id) );
 502                 if ( mlt_properties_get( properties, "title" ) )
 503                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 504                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 505                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 506
 507                 serialise_properties( context, properties, child );
 508                 serialise_service_filters( context, service, child );
 509         }
 510 }
 511
 512 static void serialise_transition( serialise_context context, mlt_service service, xmlNode *node )
 513 {
 514         xmlNode *child = node;
 515         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 516
 517         // Recurse on connected producer
 518         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 519
 520         if ( context->pass == 1 )
 521         {
 522                 // Get a new id - if already allocated, do nothing
 523                 char *id = xml_get_id( context, service, xml_transition );
 524                 if ( id == NULL )
 525                         return;
 526
 527                 child = xmlNewChild( node, NULL, _x("transition"), NULL );
 528
 529                 // Set the id
 530                 xmlNewProp( child, _x("id"), _x(id) );
 531                 if ( mlt_properties_get( properties, "title" ) )
 532                         xmlNewProp( child, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 533                 xmlNewProp( child, _x("in"), _x(mlt_properties_get( properties, "in" )) );
 534                 xmlNewProp( child, _x("out"), _x(mlt_properties_get( properties, "out" )) );
 535
 536                 serialise_properties( context, properties, child );
 537                 serialise_service_filters( context, service, child );
 538         }
 539 }
 540
 541 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 542 {
 543         // Iterate over consumer/producer connections
 544         while ( service != NULL )
 545         {
 546                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 547                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 548
 549                 // Tell about the producer
 550                 if ( strcmp( mlt_type, "producer" ) == 0 )
 551                 {
 552                         char *mlt_service = mlt_properties_get( properties, "mlt_service" );
 553                         if ( mlt_properties_get( properties, "xml" ) == NULL && ( mlt_service != NULL && !strcmp( mlt_service, "tractor" ) ) )
 554                         {
 555                                 context->pass = 0;
 556                                 serialise_tractor( context, service, node );
 557                                 context->pass = 1;
 558                                 serialise_tractor( context, service, node );
 559                                 context->pass = 0;
 560                                 break;
 561                         }
 562                         else
 563                         {
 564                                 serialise_producer( context, service, node );
 565                         }
 566                         if ( mlt_properties_get( properties, "xml" ) != NULL )
 567                                 break;
 568                 }
 569
 570                 // Tell about the framework container producers
 571                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 572                 {
 573                         char *resource = mlt_properties_get( properties, "resource" );
 574
 575                         // Recurse on multitrack's tracks
 576                         if ( strcmp( resource, "<multitrack>" ) == 0 )
 577                         {
 578                                 serialise_multitrack( context, service, node );
 579                                 break;
 580                         }
 581
 582                         // Recurse on playlist's clips
 583                         else if ( strcmp( resource, "<playlist>" ) == 0 )
 584                         {
 585                                 serialise_playlist( context, service, node );
 586                         }
 587
 588                         // Recurse on tractor's producer
 589                         else if ( strcmp( resource, "<tractor>" ) == 0 )
 590                         {
 591                                 context->pass = 0;
 592                                 serialise_tractor( context, service, node );
 593                                 context->pass = 1;
 594                                 serialise_tractor( context, service, node );
 595                                 context->pass = 0;
 596                                 break;
 597                         }
 598
 599                         // Treat it as a normal producer
 600                         else
 601                         {
 602                                 serialise_producer( context, service, node );
 603                         }
 604                 }
 605
 606                 // Tell about a filter
 607                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 608                 {
 609                         serialise_filter( context, service, node );
 610                         break;
 611                 }
 612
 613                 // Tell about a transition
 614                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 615                 {
 616                         serialise_transition( context, service, node );
 617                         break;
 618                 }
 619
 620                 // Get the next connected service
 621                 service = mlt_service_producer( service );
 622         }
 623 }
 624
 625 xmlDocPtr xml_make_doc( mlt_consumer consumer, mlt_service service )
 626 {
 627         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 628         xmlDocPtr doc = xmlNewDoc( _x("1.0") );
 629         xmlNodePtr root = xmlNewNode( NULL, _x("mlt") );
 630         struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 631
 632         xmlDocSetRootElement( doc, root );
 633
 634         // If we have root, then deal with it now
 635         if ( mlt_properties_get( properties, "root" ) != NULL )
 636         {
 637                 xmlNewProp( root, _x("root"), _x(mlt_properties_get( properties, "root" )) );
 638                 context->root = strdup( mlt_properties_get( properties, "root" ) );
 639         }
 640         else
 641         {
 642                 context->root = strdup( "" );
 643         }
 644
 645         // Assign the additional 'storage' pattern for properties
 646         context->store = mlt_properties_get( MLT_CONSUMER_PROPERTIES( consumer ), "store" );
 647
 648         // Assign a title property
 649         if ( mlt_properties_get( properties, "title" ) != NULL )
 650                 xmlNewProp( root, _x("title"), _x(mlt_properties_get( properties, "title" )) );
 651         mlt_properties_set_int( properties, "global_feed", 1 );
 652
 653         // Construct the context maps
 654         context->id_map = mlt_properties_new();
 655         context->hide_map = mlt_properties_new();
 656
 657         // Ensure producer is a framework producer
 658         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "mlt_type", "mlt_producer" );
 659
 660         // In pass one, we serialise the end producers and playlists,
 661         // adding them to a map keyed by address.
 662         serialise_service( context, service, root );
 663
 664         // In pass two, we serialise the tractor and reference the
 665         // producers and playlists
 666         context->pass++;
 667         serialise_service( context, service, root );
 668
 669         // Cleanup resource
 670         mlt_properties_close( context->id_map );
 671         mlt_properties_close( context->hide_map );
 672         free( context->root );
 673         free( context );
 674
 675         return doc;
 676 }
 677
 678 static int consumer_start( mlt_consumer this )
 679 {
 680         xmlDocPtr doc = NULL;
 681
 682         // Get the producer service
 683         mlt_service service = mlt_service_producer( MLT_CONSUMER_SERVICE( this ) );
 684         if ( service != NULL )
 685         {
 686                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 687                 char *resource =  mlt_properties_get( properties, "resource" );
 688
 689                 // Set the title if provided
 690                 if ( mlt_properties_get( properties, "title" ) )
 691                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", mlt_properties_get( properties, "title" ) );
 692                 else if ( mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "title" ) == NULL )
 693                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "title", "Anonymous Submission" );
 694
 695                 // Check for a root on the consumer properties and pass to service
 696                 if ( mlt_properties_get( properties, "root" ) )
 697                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", mlt_properties_get( properties, "root" ) );
 698
 699                 // Specify roots in other cases...
 700                 if ( resource != NULL && mlt_properties_get( properties, "root" ) == NULL )
 701                 {
 702                         // Get the current working directory
 703                         char *cwd = getcwd( NULL, 0 );
 704                         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "root", cwd );
 705                         free( cwd );
 706                 }
 707
 708                 // Make the document
 709                 doc = xml_make_doc( this, service );
 710
 711                 // Handle the output
 712                 if ( resource == NULL || !strcmp( resource, "" ) )
 713                 {
 714                         xmlDocFormatDump( stdout, doc, 1 );
 715                 }
 716                 else if ( strchr( resource, '.' ) == NULL )
 717                 {
 718                         xmlChar *buffer = NULL;
 719                         int length = 0;
 720                         xmlDocDumpMemoryEnc( doc, &buffer, &length, "utf-8" );
 721                         mlt_properties_set( properties, resource, _s(buffer) );
 722                         xmlFree( buffer );
 723                 }
 724                 else
 725                 {
 726                         xmlSaveFormatFileEnc( resource, doc, "utf-8", 1 );
 727                 }
 728
 729                 // Close the document
 730                 xmlFreeDoc( doc );
 731         }
 732
 733         mlt_consumer_stop( this );
 734
 735         mlt_consumer_stopped( this );
 736
 737         return 0;
 738 }
 739
 740 static int consumer_is_stopped( mlt_consumer this )
 741 {
 742         return 1;
 743 }