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

   1 /*
   2  * producer_westley.c -- a libxml2 parser of mlt service networks
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 // TODO: destroy unreferenced producers
  22
  23 #include "producer_westley.h"
  24 #include <framework/mlt.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28
  29 #include <libxml/parser.h>
  30
  31 #define STACK_SIZE 1000
  32
  33 struct deserialise_context_s
  34 {
  35         mlt_service stack_service[ STACK_SIZE ];
  36         int stack_service_size;
  37         mlt_properties producer_map;
  38         mlt_properties destructors;
  39         char *property;
  40         mlt_properties producer_properties;
  41 };
  42 typedef struct deserialise_context_s *deserialise_context;
  43
  44
  45 /** Push a service.
  46 */
  47
  48 static int context_push_service( deserialise_context this, mlt_service that )
  49 {
  50         int ret = this->stack_service_size >= STACK_SIZE;
  51         if ( ret == 0 )
  52                 this->stack_service[ this->stack_service_size ++ ] = that;
  53         return ret;
  54 }
  55
  56 /** Pop a service.
  57 */
  58
  59 static mlt_service context_pop_service( deserialise_context this )
  60 {
  61         mlt_service result = NULL;
  62         if ( this->stack_service_size > 0 )
  63                 result = this->stack_service[ -- this->stack_service_size ];
  64         return result;
  65 }
  66
  67 // Set the destructor on a new service
  68 static void track_service( mlt_properties properties, void *service, mlt_destructor destructor )
  69 {
  70         int registered = mlt_properties_get_int( properties, "registered" );
  71         char *key = mlt_properties_get( properties, "registered" );
  72         mlt_properties_set_data( properties, key, service, 0, destructor, NULL );
  73         mlt_properties_set_int( properties, "registered", ++ registered );
  74 }
  75
  76 static void on_start_tractor( deserialise_context context, const xmlChar *name, const xmlChar **atts)
  77 {
  78         mlt_service service = mlt_tractor_service( mlt_tractor_init() );
  79         mlt_properties properties = mlt_service_properties( service );
  80
  81         track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
  82
  83         mlt_properties_set_position( properties, "length", 0 );
  84
  85         for ( ; atts != NULL && *atts != NULL; atts += 2 )
  86                 mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
  87
  88         if ( mlt_properties_get_position( properties, "length" ) < mlt_properties_get_position( properties, "out" ) )
  89         {
  90                 mlt_position length = mlt_properties_get_position( properties, "out" ) + 1;
  91                 mlt_properties_set_position( properties, "length", length );
  92         }
  93
  94         context_push_service( context, service );
  95 }
  96
  97 static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
  98 {
  99         mlt_service service = mlt_multitrack_service( mlt_multitrack_init() );
 100         mlt_properties properties = mlt_service_properties( service );
 101
 102         track_service( context->destructors, service, (mlt_destructor) mlt_multitrack_close );
 103
 104         mlt_properties_set_position( properties, "length", 0 );
 105
 106         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 107                 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
 108
 109         context_push_service( context, service );
 110 }
 111
 112 static void on_start_playlist( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 113 {
 114         mlt_service service = mlt_playlist_service( mlt_playlist_init() );
 115         mlt_properties properties = mlt_service_properties( service );
 116
 117         track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
 118
 119         mlt_properties_set_position( properties, "length", 0 );
 120
 121         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 122         {
 123                 mlt_properties_set( properties, ( char* )atts[0], ( char* )atts[1] );
 124                 if ( strcmp( atts[ 0 ], "out" ) == 0 )
 125                         mlt_properties_set( properties, "_westley.out", ( char* )atts[ 1 ] );
 126         }
 127
 128         if ( mlt_properties_get( properties, "id" ) != NULL )
 129                 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
 130
 131         context_push_service( context, service );
 132 }
 133
 134 static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 135 {
 136         mlt_properties properties = context->producer_properties = mlt_properties_new();
 137
 138         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 139         {
 140                 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
 141         }
 142 }
 143
 144 static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 145 {
 146         // Get the playlist from the stack
 147         mlt_service service = context_pop_service( context );
 148         mlt_position length = 0;
 149
 150         // Look for the length attribute
 151         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 152         {
 153                 if ( strcmp( atts[0], "length" ) == 0 )
 154                 {
 155                         length = atoll( atts[1] );
 156                         break;
 157                 }
 158         }
 159
 160         // Append a blank to the playlist
 161         mlt_playlist_blank( MLT_PLAYLIST( service ), length - 1 );
 162
 163         // Push the playlist back onto the stack
 164         context_push_service( context, service );
 165 }
 166
 167 static void on_start_entry_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 168 {
 169         // Look for the producer attribute
 170         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 171         {
 172                 if ( strcmp( atts[0], "producer" ) == 0 )
 173                 {
 174                         if ( mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL ) !=  NULL )
 175                                 // Push the referenced producer onto the stack
 176                                 context_push_service( context, MLT_SERVICE( mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL ) ) );
 177                         break;
 178                 }
 179         }
 180 }
 181
 182 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 183 {
 184         mlt_properties properties = context->producer_properties = mlt_properties_new();
 185
 186         // Set the properties
 187         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 188                 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
 189 }
 190
 191 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 192 {
 193         mlt_properties properties = context->producer_properties = mlt_properties_new();
 194
 195         // Set the properties
 196         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 197                 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
 198 }
 199
 200 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 201 {
 202         mlt_properties properties = context->producer_properties;
 203         char *value = NULL;
 204
 205         if ( properties == NULL )
 206                 return;
 207
 208         // Set the properties
 209         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 210         {
 211                 if ( strcmp( atts[ 0 ], "name" ) == 0 )
 212                 {
 213                         context->property = strdup( atts[ 1 ] );
 214                 }
 215                 else if ( strcmp( atts[ 0 ], "value" ) == 0 )
 216                 {
 217                         value = (char*) atts[ 1 ];
 218                 }
 219         }
 220
 221         if ( context->property != NULL && value != NULL )
 222                 mlt_properties_set( properties, context->property, value );
 223 }
 224
 225 static void on_end_multitrack( deserialise_context context, const xmlChar *name )
 226 {
 227         // Get the producer (multitrack) from the stack
 228         mlt_service producer = context_pop_service( context );
 229
 230         // Get the tractor from the stack
 231         mlt_service service = context_pop_service( context );
 232
 233         // Connect the tractor to the producer
 234         mlt_tractor_connect( MLT_TRACTOR( service ), producer );
 235         mlt_properties_set_data( mlt_service_properties( service ), "multitrack",
 236                 MLT_MULTITRACK( producer ), 0, NULL, NULL );
 237
 238         // Push the tractor back onto the stack
 239         context_push_service( context, service );
 240
 241         // Push the producer back onto the stack
 242         context_push_service( context, producer );
 243 }
 244
 245 static void on_end_playlist( deserialise_context context, const xmlChar *name )
 246 {
 247         // Get the playlist from the stack
 248         mlt_service service = context_pop_service( context );
 249         mlt_properties properties = mlt_service_properties( service );
 250
 251         mlt_position in = mlt_properties_get_position( properties, "in" );
 252         mlt_position out;
 253
 254         if ( mlt_properties_get( properties, "_westley.out" ) != NULL )
 255                 out = mlt_properties_get_position( properties, "_westley.out" );
 256         else
 257                 out = mlt_properties_get_position( properties, "length" ) - 1;
 258
 259         if ( mlt_properties_get_position( properties, "length" ) < out )
 260                 mlt_properties_set_position( properties, "length", out  + 1 );
 261
 262         mlt_producer_set_in_and_out( MLT_PRODUCER( service ), in, out );
 263
 264         // Push the playlist back onto the stack
 265         context_push_service( context, service );
 266 }
 267
 268 static void on_end_track( deserialise_context context, const xmlChar *name )
 269 {
 270         // Get the producer from the stack
 271         mlt_service producer = context_pop_service( context );
 272
 273         // Get the multitrack from the stack
 274         mlt_service service = context_pop_service( context );
 275
 276         // Set the track on the multitrack
 277         mlt_multitrack_connect( MLT_MULTITRACK( service ),
 278                 MLT_PRODUCER( producer ),
 279                 mlt_multitrack_count( MLT_MULTITRACK( service ) ) );
 280
 281         // Push the multitrack back onto the stack
 282         context_push_service( context, service );
 283 }
 284
 285 static void on_end_entry( deserialise_context context, const xmlChar *name )
 286 {
 287         // Get the producer from the stack
 288         mlt_service producer = context_pop_service( context );
 289
 290         // Get the playlist from the stack
 291         mlt_service service = context_pop_service( context );
 292
 293         // Append the producer to the playlist
 294         // TODO: THIS IS NOT CORRECT - an entry SHOULD have in/out points of its own
 295         mlt_playlist_append_io( MLT_PLAYLIST( service ),
 296                 MLT_PRODUCER( producer ), 0,
 297                 mlt_properties_get_position( mlt_service_properties( producer ), "out" ) - mlt_properties_get_position( mlt_service_properties( producer ), "in" ) + 1 );
 298
 299         // Push the playlist back onto the stack
 300         context_push_service( context, service );
 301 }
 302
 303 static void on_end_tractor( deserialise_context context, const xmlChar *name )
 304 {
 305         // Get and discard the last producer
 306         mlt_producer multitrack = MLT_PRODUCER( context_pop_service( context ) );
 307
 308         // Get the tractor
 309         mlt_service tractor = context_pop_service( context );
 310         multitrack = mlt_properties_get_data( mlt_service_properties( tractor ), "multitrack", NULL );
 311
 312         // Inherit the producer's properties
 313         mlt_properties properties = mlt_producer_properties( multitrack );
 314         mlt_properties_set_position( properties, "length", mlt_producer_get_out( multitrack ) + 1 );
 315         mlt_producer_set_in_and_out( multitrack, 0, mlt_producer_get_out( multitrack ) );
 316         mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( multitrack ) );
 317
 318         // Push the playlist back onto the stack
 319         context_push_service( context, tractor );
 320 }
 321
 322 static void on_end_property( deserialise_context context, const xmlChar *name )
 323 {
 324         // Close this property handling
 325         free( context->property );
 326         context->property = NULL;
 327 }
 328
 329 static void on_end_producer( deserialise_context context, const xmlChar *name )
 330 {
 331         mlt_properties properties = context->producer_properties;
 332         mlt_service service = NULL;
 333
 334         if ( properties == NULL )
 335                 return;
 336
 337         // Instatiate the producer
 338         service = MLT_SERVICE( mlt_factory_producer( "fezzik", mlt_properties_get( properties, "resource" ) ) );
 339
 340         if ( service == NULL && mlt_properties_get( properties, "mlt_service" ) != NULL )
 341         {
 342                 service = MLT_SERVICE( mlt_factory_producer( mlt_properties_get( properties, "mlt_service" ),
 343                         mlt_properties_get( properties, "resource" ) ) );
 344         }
 345
 346         track_service( context->destructors, service, (mlt_destructor) mlt_producer_close );
 347
 348         // Add the producer to the producer map
 349         if ( mlt_properties_get( properties, "id" ) != NULL )
 350                 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
 351
 352         mlt_properties_inherit( mlt_service_properties( service ), properties );
 353         mlt_properties_close( properties );
 354         context->producer_properties = NULL;
 355         properties = mlt_service_properties( service );
 356
 357         // Set in and out
 358         mlt_producer_set_in_and_out( MLT_PRODUCER( service ),
 359                 mlt_properties_get_position( properties, "in" ),
 360                 mlt_properties_get_position( properties, "out" ) );
 361
 362         // Push the new producer onto the stack
 363         context_push_service( context, service );
 364 }
 365
 366 static void on_end_filter( deserialise_context context, const xmlChar *name )
 367 {
 368         mlt_properties properties = context->producer_properties;
 369         if ( properties == NULL )
 370                 return;
 371
 372         char *id;
 373         char key[11];
 374         key[ 10 ] = '\0';
 375
 376         // Get the producer from the stack
 377         mlt_service producer = context_pop_service( context );
 378 //fprintf( stderr, "connecting filter to %s\n", mlt_properties_get( mlt_service_properties( producer ), "resource" ) );
 379
 380         // Create the filter
 381         mlt_service service = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
 382
 383         track_service( context->destructors, service, (mlt_destructor) mlt_filter_close );
 384
 385         // Connect the filter to the producer
 386         mlt_filter_connect( MLT_FILTER( service ), producer,
 387                 mlt_properties_get_int( properties, "track" ) );
 388
 389         // Set in and out from producer if non existant
 390         if ( mlt_properties_get( properties, "in" ) == NULL )
 391                 mlt_properties_set_position( properties, "in", mlt_producer_get_in( MLT_PRODUCER( producer ) ) );
 392         if ( mlt_properties_get( properties, "out" ) == NULL )
 393                 mlt_properties_set_position( properties, "out", mlt_producer_get_out( MLT_PRODUCER( producer ) ) );
 394
 395         // Propogate the properties
 396         mlt_properties_inherit( mlt_service_properties( service ), properties );
 397         mlt_properties_close( properties );
 398         context->producer_properties = NULL;
 399         properties = mlt_service_properties( service );
 400
 401         // Set in and out
 402 //fprintf( stderr, "setting filter in %lld out %lld\n", mlt_properties_get_position( properties, "in" ), mlt_properties_get_position( properties, "out" ) );
 403         mlt_filter_set_in_and_out( MLT_FILTER( service ),
 404                 mlt_properties_get_position( properties, "in" ),
 405                 mlt_properties_get_position( properties, "out" ) );
 406
 407         // Get the parent producer from the stack
 408         mlt_service tractor = context_pop_service( context );
 409
 410         if ( tractor != NULL )
 411         {
 412 //fprintf( stderr, "connecting tractor %s to filter\n", mlt_properties_get( mlt_service_properties( tractor ), "resource" ) );
 413                 // Connect the tractor to the filter
 414                 if ( strcmp( mlt_properties_get( mlt_service_properties( tractor ), "resource" ), "<tractor>" ) == 0 )
 415                         mlt_tractor_connect( MLT_TRACTOR( tractor ), service );
 416
 417                 // Push the parent producer back onto the stack
 418                 context_push_service( context, tractor );
 419         }
 420
 421 //fprintf( stderr, "setting filter in %lld out %lld\n", mlt_properties_get_position( properties, "in" ), mlt_properties_get_position( properties, "out" ) );
 422         // If a producer alias is in the producer_map, get it
 423         snprintf( key, 10, "%p", producer );
 424         if ( mlt_properties_get_data( context->producer_map, key, NULL ) != NULL )
 425                 producer = mlt_properties_get_data( context->producer_map, key, NULL );
 426
 427         // Put the producer in the producer map
 428         id = mlt_properties_get( mlt_service_properties( producer ), "id" );
 429         if ( id != NULL )
 430                 mlt_properties_set_data( context->producer_map, id, service, 0, NULL, NULL );
 431
 432         // For filter chain support, add an alias to the producer map
 433         snprintf( key, 10, "%p", service );
 434         mlt_properties_set_data( context->producer_map, key, producer, 0, NULL, NULL );
 435
 436         // Push the filter onto the stack
 437         context_push_service( context, service );
 438
 439 }
 440
 441 static void on_end_transition( deserialise_context context, const xmlChar *name )
 442 {
 443         mlt_properties properties = context->producer_properties;
 444         if ( properties == NULL )
 445                 return;
 446
 447         // Get the producer from the stack
 448         mlt_service producer = context_pop_service( context );
 449
 450         // Create the transition
 451         mlt_service service = MLT_SERVICE( mlt_factory_transition( mlt_properties_get( properties, "mlt_service" ), NULL ) );
 452
 453         track_service( context->destructors, service, (mlt_destructor) mlt_transition_close );
 454
 455         // Propogate the properties
 456         mlt_properties_inherit( mlt_service_properties( service ), properties );
 457         mlt_properties_close( properties );
 458         context->producer_properties = NULL;
 459         properties = mlt_service_properties( service );
 460
 461         // Set in and out
 462         mlt_transition_set_in_and_out( MLT_TRANSITION( service ),
 463                 mlt_properties_get_position( properties, "in" ),
 464                 mlt_properties_get_position( properties, "out" ) );
 465
 466         // Connect the filter to the producer
 467         mlt_transition_connect( MLT_TRANSITION( service ), producer,
 468                 mlt_properties_get_int( properties, "a_track" ),
 469                 mlt_properties_get_int( properties, "b_track" ) );
 470
 471         // Get the tractor from the stack
 472         mlt_service tractor = context_pop_service( context );
 473
 474         // Connect the tractor to the transition
 475         mlt_tractor_connect( MLT_TRACTOR( tractor ), service );
 476
 477         // Push the tractor back onto the stack
 478         context_push_service( context, tractor );
 479
 480         // Push the transition onto the stack
 481         context_push_service( context, service );
 482 }
 483
 484 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
 485 {
 486         deserialise_context context = ( deserialise_context ) ctx;
 487
 488         if ( strcmp( name, "tractor" ) == 0 )
 489                 on_start_tractor( context, name, atts );
 490         else if ( strcmp( name, "multitrack" ) == 0 )
 491                 on_start_multitrack( context, name, atts );
 492         else if ( strcmp( name, "playlist" ) == 0 )
 493                 on_start_playlist( context, name, atts );
 494         else if ( strcmp( name, "producer" ) == 0 )
 495                 on_start_producer( context, name, atts );
 496         else if ( strcmp( name, "blank" ) == 0 )
 497                 on_start_blank( context, name, atts );
 498         else if ( strcmp( name, "entry" ) == 0 || strcmp( name, "track" ) == 0 )
 499                 on_start_entry_track( context, name, atts );
 500         else if ( strcmp( name, "filter" ) == 0 )
 501                 on_start_filter( context, name, atts );
 502         else if ( strcmp( name, "transition" ) == 0 )
 503                 on_start_transition( context, name, atts );
 504         else if ( strcmp( name, "property" ) == 0 )
 505                 on_start_property( context, name, atts );
 506 }
 507
 508 static void on_end_element( void *ctx, const xmlChar *name )
 509 {
 510         deserialise_context context = ( deserialise_context ) ctx;
 511
 512         if ( strcmp( name, "multitrack" ) == 0 )
 513                 on_end_multitrack( context, name );
 514         else if ( strcmp( name, "playlist" ) == 0 )
 515                 on_end_playlist( context, name );
 516         else if ( strcmp( name, "track" ) == 0 )
 517                 on_end_track( context, name );
 518         else if ( strcmp( name, "entry" ) == 0 )
 519                 on_end_entry( context, name );
 520         else if ( strcmp( name, "tractor" ) == 0 )
 521                 on_end_tractor( context, name );
 522         else if ( strcmp( name, "property" ) == 0 )
 523                 on_end_property( context, name );
 524         else if ( strcmp( name, "producer" ) == 0 )
 525                 on_end_producer( context, name );
 526         else if ( strcmp( name, "filter" ) == 0 )
 527                 on_end_filter( context, name );
 528         else if ( strcmp( name, "transition" ) == 0 )
 529                 on_end_transition( context, name );
 530 }
 531
 532 static void on_characters( void *ctx, const xmlChar *ch, int len )
 533 {
 534         deserialise_context context = ( deserialise_context ) ctx;
 535         char *value = calloc( len + 1, 1 );
 536
 537         value[ len ] = 0;
 538         strncpy( value, (const char*) ch, len );
 539
 540         if ( context->property != NULL && context->producer_properties != NULL )
 541                 mlt_properties_set( context->producer_properties, context->property, value );
 542
 543         free( value);
 544 }
 545
 546 mlt_producer producer_westley_init( char *filename )
 547 {
 548         static int init = 0;
 549         xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
 550         struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
 551         mlt_properties properties = NULL;
 552         int i = 0;
 553
 554         context->producer_map = mlt_properties_new();
 555         context->destructors = mlt_properties_new();
 556         // We need to track the number of registered filters
 557         mlt_properties_set_int( context->destructors, "registered", 0 );
 558         sax->startElement = on_start_element;
 559         sax->endElement = on_end_element;
 560         sax->characters = on_characters;
 561
 562         if ( !init )
 563         {
 564                 xmlInitParser();
 565                 //init = 1;
 566         }
 567
 568         xmlSAXUserParseFile( sax, context, filename );
 569
 570         // Need the complete producer list for various reasons
 571         properties = context->destructors;
 572
 573         // Get the last producer on the stack
 574         mlt_service service = context_pop_service( context );
 575
 576         // Do we actually have a producer here?
 577         if ( service != NULL )
 578         {
 579                 // Now make sure we don't have a reference to the service in the properties
 580                 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
 581                 {
 582                         char *name = mlt_properties_get_name( properties, i );
 583                         if ( mlt_properties_get_data( properties, name, NULL ) == service )
 584                         {
 585                                 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
 586                                 break;
 587                         }
 588                 }
 589
 590                 // We are done referencing destructor property list
 591                 // Set this var to service properties for convenience
 592                 properties = mlt_service_properties( service );
 593
 594                 // make the returned service destroy the connected services
 595                 mlt_properties_set_data( properties, "__destructors__", context->destructors, 0, (mlt_destructor) mlt_properties_close, NULL );
 596
 597                 // Now assign additional properties
 598                 mlt_properties_set( properties, "resource", filename );
 599
 600                 // This tells consumer_westley not to deep copy
 601                 mlt_properties_set( properties, "westley", "was here" );
 602         }
 603         else
 604         {
 605                 // Clean up
 606                 mlt_properties_close( properties );
 607         }
 608
 609         free( context->stack_service );
 610         mlt_properties_close( context->producer_map );
 611         //free( context );
 612         free( sax );
 613         xmlCleanupParser();
 614         xmlMemoryDump( );
 615
 616
 617         return MLT_PRODUCER( service );
 618 }
 619