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