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

   1 /*
   2  * producer_xml.c -- a libxml2 parser 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 // TODO: destroy unreferenced producers (they are currently destroyed
  22 //       when the returned producer is closed).
  23
  24 #include <framework/mlt.h>
  25 #include <framework/mlt_log.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <ctype.h>
  29 #include <unistd.h>
  30
  31 #include <libxml/parser.h>
  32 #include <libxml/parserInternals.h> // for xmlCreateFileParserCtxt
  33 #include <libxml/tree.h>
  34
  35 #define STACK_SIZE 1000
  36 #define BRANCH_SIG_LEN 4000
  37
  38 #define _x (const xmlChar*)
  39 #define _s (const char*)
  40
  41 #undef DEBUG
  42 #ifdef DEBUG
  43 extern xmlDocPtr xml_make_doc( mlt_service service );
  44 #endif
  45
  46 enum service_type
  47 {
  48         mlt_invalid_type,
  49         mlt_unknown_type,
  50         mlt_producer_type,
  51         mlt_playlist_type,
  52         mlt_entry_type,
  53         mlt_tractor_type,
  54         mlt_multitrack_type,
  55         mlt_filter_type,
  56         mlt_transition_type,
  57         mlt_consumer_type,
  58         mlt_field_type,
  59         mlt_services_type,
  60         mlt_dummy_filter_type,
  61         mlt_dummy_transition_type,
  62         mlt_dummy_producer_type,
  63         mlt_dummy_consumer_type
  64 };
  65
  66 struct deserialise_context_s
  67 {
  68         enum service_type stack_types[ STACK_SIZE ];
  69         mlt_service stack_service[ STACK_SIZE ];
  70         int stack_service_size;
  71         mlt_properties producer_map;
  72         mlt_properties destructors;
  73         char *property;
  74         int is_value;
  75         xmlDocPtr value_doc;
  76         xmlNodePtr stack_node[ STACK_SIZE ];
  77         int stack_node_size;
  78         xmlDocPtr entity_doc;
  79         int entity_is_replace;
  80         int depth;
  81         int branch[ STACK_SIZE ];
  82         const xmlChar *publicId;
  83         const xmlChar *systemId;
  84         mlt_properties params;
  85         mlt_profile profile;
  86         int pass;
  87         char *lc_numeric;
  88         mlt_consumer consumer;
  89         int multi_consumer;
  90         int consumer_count;
  91         int seekable;
  92 };
  93 typedef struct deserialise_context_s *deserialise_context;
  94
  95 /** Trim the leading and trailing whitespace from a string in-place.
  96 */
  97 static char* trim( char *s )
  98 {
  99         int n;
 100         if ( s && ( n = strlen( s ) ) )
 101         {
 102                 int i = 0;
 103                 while ( i < n && isspace( s[i] ) ) i++;
 104                 while ( --n && isspace( s[n] ) );
 105                 n = n - i + 1;
 106                 if ( n > 0 )
 107                         memmove( s, s + i, n );
 108                 s[ n ] = 0;
 109         }
 110         return s;
 111 }
 112
 113 /** Convert the numerical current branch address to a dot-delimited string.
 114 */
 115 static char *serialise_branch( deserialise_context context, char *s )
 116 {
 117         int i;
 118
 119         s[0] = 0;
 120         for ( i = 0; i < context->depth; i++ )
 121         {
 122                 int len = strlen( s );
 123                 snprintf( s + len, BRANCH_SIG_LEN - len, "%d.", context->branch[ i ] );
 124         }
 125         return s;
 126 }
 127
 128 /** Push a service.
 129 */
 130
 131 static int context_push_service( deserialise_context context, mlt_service that, enum service_type type )
 132 {
 133         int ret = context->stack_service_size >= STACK_SIZE - 1;
 134         if ( ret == 0 )
 135         {
 136                 context->stack_service[ context->stack_service_size ] = that;
 137                 context->stack_types[ context->stack_service_size++ ] = type;
 138
 139                 // Record the tree branch on which this service lives
 140                 if ( that != NULL && mlt_properties_get( MLT_SERVICE_PROPERTIES( that ), "_xml_branch" ) == NULL )
 141                 {
 142                         char s[ BRANCH_SIG_LEN ];
 143                         mlt_properties_set( MLT_SERVICE_PROPERTIES( that ), "_xml_branch", serialise_branch( context, s ) );
 144                 }
 145         }
 146         return ret;
 147 }
 148
 149 /** Pop a service.
 150 */
 151
 152 static mlt_service context_pop_service( deserialise_context context, enum service_type *type )
 153 {
 154         mlt_service result = NULL;
 155
 156         if ( type ) *type = invalid_type;
 157         if ( context->stack_service_size > 0 )
 158         {
 159                 result = context->stack_service[ -- context->stack_service_size ];
 160                 if ( type != NULL )
 161                         *type = context->stack_types[ context->stack_service_size ];
 162                 // Set the service's profile and locale so mlt_property time-to-position conversions can get fps
 163                 if ( result )
 164                 {
 165                         mlt_properties_set_data( MLT_SERVICE_PROPERTIES( result ), "_profile", context->profile, 0, NULL, NULL );
 166                         mlt_properties_set_lcnumeric( MLT_SERVICE_PROPERTIES( result ), context->lc_numeric );
 167                 }
 168         }
 169         return result;
 170 }
 171
 172 /** Push a node.
 173 */
 174
 175 static int context_push_node( deserialise_context context, xmlNodePtr node )
 176 {
 177         int ret = context->stack_node_size >= STACK_SIZE - 1;
 178         if ( ret == 0 )
 179                 context->stack_node[ context->stack_node_size ++ ] = node;
 180         return ret;
 181 }
 182
 183 /** Pop a node.
 184 */
 185
 186 static xmlNodePtr context_pop_node( deserialise_context context )
 187 {
 188         xmlNodePtr result = NULL;
 189         if ( context->stack_node_size > 0 )
 190                 result = context->stack_node[ -- context->stack_node_size ];
 191         return result;
 192 }
 193
 194
 195 // Set the destructor on a new service
 196 static void track_service( mlt_properties properties, void *service, mlt_destructor destructor )
 197 {
 198         int registered = mlt_properties_get_int( properties, "registered" );
 199         char *key = mlt_properties_get( properties, "registered" );
 200         mlt_properties_set_data( properties, key, service, 0, destructor, NULL );
 201         mlt_properties_set_int( properties, "registered", ++ registered );
 202 }
 203
 204
 205 // Prepend the property value with the document root
 206 static inline void qualify_property( deserialise_context context, mlt_properties properties, const char *name )
 207 {
 208         char *resource = mlt_properties_get( properties, name );
 209         if ( resource != NULL && resource[0] )
 210         {
 211                 // Qualify file name properties
 212                 char *root = mlt_properties_get( context->producer_map, "root" );
 213                 if ( root != NULL && strcmp( root, "" ) )
 214                 {
 215                         char *full_resource = malloc( strlen( root ) + strlen( resource ) + 2 );
 216                         if ( resource[ 0 ] != '/' && strchr( resource, ':' ) == NULL )
 217                         {
 218                                 strcpy( full_resource, root );
 219                                 strcat( full_resource, "/" );
 220                                 strcat( full_resource, resource );
 221                         }
 222                         else
 223                         {
 224                                 strcpy( full_resource, resource );
 225                         }
 226                         mlt_properties_set( properties, name, full_resource );
 227                         free( full_resource );
 228                 }
 229         }
 230 }
 231
 232
 233 /** This function adds a producer to a playlist or multitrack when
 234     there is no entry or track element.
 235 */
 236
 237 static int add_producer( deserialise_context context, mlt_service service, mlt_position in, mlt_position out )
 238 {
 239         // Return value (0 = service remains top of stack, 1 means it can be removed)
 240         int result = 0;
 241
 242         // Get the parent producer
 243         enum service_type type = mlt_invalid_type;
 244         mlt_service container = context_pop_service( context, &type );
 245         int contained = 0;
 246
 247         if ( service != NULL && container != NULL )
 248         {
 249                 char *container_branch = mlt_properties_get( MLT_SERVICE_PROPERTIES( container ), "_xml_branch" );
 250                 char *service_branch = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "_xml_branch" );
 251                 contained = !strncmp( container_branch, service_branch, strlen( container_branch ) );
 252         }
 253
 254         if ( contained )
 255         {
 256                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 257                 char *hide_s = mlt_properties_get( properties, "hide" );
 258
 259                 // Indicate that this service is no longer top of stack
 260                 result = 1;
 261
 262                 switch( type )
 263                 {
 264                         case mlt_tractor_type:
 265                                 {
 266                                         mlt_multitrack multitrack = mlt_tractor_multitrack( MLT_TRACTOR( container ) );
 267                                         mlt_multitrack_connect( multitrack, MLT_PRODUCER( service ), mlt_multitrack_count( multitrack ) );
 268                                 }
 269                                 break;
 270                         case mlt_multitrack_type:
 271                                 {
 272                                         mlt_multitrack_connect( MLT_MULTITRACK( container ),
 273                                                 MLT_PRODUCER( service ),
 274                                                 mlt_multitrack_count( MLT_MULTITRACK( container ) ) );
 275                                 }
 276                                 break;
 277                         case mlt_playlist_type:
 278                                 {
 279                                         mlt_playlist_append_io( MLT_PLAYLIST( container ), MLT_PRODUCER( service ), in, out );
 280                                 }
 281                                 break;
 282                         default:
 283                                 result = 0;
 284                                 mlt_log_warning( NULL, "[producer_xml] Producer defined inside something that isn't a container\n" );
 285                                 break;
 286                 };
 287
 288                 // Set the hide state of the track producer
 289                 if ( hide_s != NULL )
 290                 {
 291                         if ( strcmp( hide_s, "video" ) == 0 )
 292                                 mlt_properties_set_int( properties, "hide", 1 );
 293                         else if ( strcmp( hide_s, "audio" ) == 0 )
 294                                 mlt_properties_set_int( properties, "hide", 2 );
 295                         else if ( strcmp( hide_s, "both" ) == 0 )
 296                                 mlt_properties_set_int( properties, "hide", 3 );
 297                 }
 298         }
 299
 300         // Put the parent producer back
 301         if ( container != NULL )
 302                 context_push_service( context, container, type );
 303
 304         return result;
 305 }
 306
 307 /** Attach filters defined on that to this.
 308 */
 309
 310 static void attach_filters( mlt_service service, mlt_service that )
 311 {
 312         if ( that != NULL )
 313         {
 314                 int i = 0;
 315                 mlt_filter filter = NULL;
 316                 for ( i = 0; ( filter = mlt_service_filter( that, i ) ) != NULL; i ++ )
 317                 {
 318                         mlt_service_attach( service, filter );
 319                         attach_filters( MLT_FILTER_SERVICE( filter ), MLT_FILTER_SERVICE( filter ) );
 320                 }
 321         }
 322 }
 323
 324 static void on_start_profile( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 325 {
 326         mlt_profile p = context->profile;
 327         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 328         {
 329                 if ( xmlStrcmp( atts[ 0 ], _x("name") ) == 0 || xmlStrcmp( atts[ 0 ], _x("profile") ) == 0 )
 330                 {
 331                         mlt_profile my_profile = mlt_profile_init( _s(atts[ 1 ]) );
 332                         if ( my_profile )
 333                         {
 334                                 p->description = strdup( my_profile->description );
 335                                 p->display_aspect_den = my_profile->display_aspect_den;
 336                                 p->display_aspect_num = my_profile->display_aspect_num;
 337                                 p->frame_rate_den = my_profile->frame_rate_den;
 338                                 p->frame_rate_num = my_profile->frame_rate_num;
 339                                 p->width = my_profile->width;
 340                                 p->height = my_profile->height;
 341                                 p->progressive = my_profile->progressive;
 342                                 p->sample_aspect_den = my_profile->sample_aspect_den;
 343                                 p->sample_aspect_num = my_profile->sample_aspect_num;
 344                                 p->colorspace = my_profile->colorspace;
 345                                 p->is_explicit = 1;
 346                                 mlt_profile_close( my_profile );
 347                         }
 348                 }
 349                 else if ( xmlStrcmp( atts[ 0 ], _x("description") ) == 0 )
 350                 {
 351                         if ( p->description )
 352                                 free( p->description );
 353                         p->description = strdup( _s(atts[ 1 ]) );
 354                         p->is_explicit = 1;
 355                 }
 356                 else if ( xmlStrcmp( atts[ 0 ], _x("display_aspect_den") ) == 0 )
 357                         p->display_aspect_den = strtol( _s(atts[ 1 ]), NULL, 0 );
 358                 else if ( xmlStrcmp( atts[ 0 ], _x("display_aspect_num") ) == 0 )
 359                         p->display_aspect_num = strtol( _s(atts[ 1 ]), NULL, 0 );
 360                 else if ( xmlStrcmp( atts[ 0 ], _x("sample_aspect_num") ) == 0 )
 361                         p->sample_aspect_num = strtol( _s(atts[ 1 ]), NULL, 0 );
 362                 else if ( xmlStrcmp( atts[ 0 ], _x("sample_aspect_den") ) == 0 )
 363                         p->sample_aspect_den = strtol( _s(atts[ 1 ]), NULL, 0 );
 364                 else if ( xmlStrcmp( atts[ 0 ], _x("width") ) == 0 )
 365                         p->width = strtol( _s(atts[ 1 ]), NULL, 0 );
 366                 else if ( xmlStrcmp( atts[ 0 ], _x("height") ) == 0 )
 367                         p->height = strtol( _s(atts[ 1 ]), NULL, 0 );
 368                 else if ( xmlStrcmp( atts[ 0 ], _x("progressive") ) == 0 )
 369                         p->progressive = strtol( _s(atts[ 1 ]), NULL, 0 );
 370                 else if ( xmlStrcmp( atts[ 0 ], _x("frame_rate_num") ) == 0 )
 371                         p->frame_rate_num = strtol( _s(atts[ 1 ]), NULL, 0 );
 372                 else if ( xmlStrcmp( atts[ 0 ], _x("frame_rate_den") ) == 0 )
 373                         p->frame_rate_den = strtol( _s(atts[ 1 ]), NULL, 0 );
 374                 else if ( xmlStrcmp( atts[ 0 ], _x("colorspace") ) == 0 )
 375                         p->colorspace = strtol( _s(atts[ 1 ]), NULL, 0 );
 376         }
 377 }
 378
 379 static void on_start_tractor( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 380 {
 381         mlt_tractor tractor = mlt_tractor_new( );
 382         mlt_service service = MLT_TRACTOR_SERVICE( tractor );
 383         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 384
 385         track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
 386         mlt_properties_set_lcnumeric( MLT_SERVICE_PROPERTIES( service ), context->lc_numeric );
 387
 388         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 389                 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (const char*) atts[0], atts[1] == NULL ? "" : (const char*) atts[1] );
 390
 391         mlt_properties_set_int( MLT_TRACTOR_PROPERTIES( tractor ), "global_feed", 1 );
 392
 393         if ( mlt_properties_get( properties, "id" ) != NULL )
 394                 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
 395
 396         context_push_service( context, service, mlt_tractor_type );
 397 }
 398
 399 static void on_end_tractor( deserialise_context context, const xmlChar *name )
 400 {
 401         // Get the tractor
 402         enum service_type type;
 403         mlt_service tractor = context_pop_service( context, &type );
 404
 405         if ( tractor != NULL && type == mlt_tractor_type )
 406         {
 407                 // See if the tractor should be added to a playlist or multitrack
 408                 if ( add_producer( context, tractor, 0, mlt_producer_get_out( MLT_PRODUCER( tractor ) ) ) == 0 )
 409                         context_push_service( context, tractor, type );
 410         }
 411         else
 412         {
 413                 mlt_log_error( NULL, "[producer_xml] Invalid state for tractor\n" );
 414         }
 415 }
 416
 417 static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 418 {
 419         enum service_type type;
 420         mlt_service parent = context_pop_service( context, &type );
 421
 422         // If we don't have a parent, then create one now, providing we're in a state where we can
 423         if ( parent == NULL || ( type == mlt_playlist_type || type == mlt_multitrack_type ) )
 424         {
 425                 mlt_tractor tractor = NULL;
 426                 // Push the parent back
 427                 if ( parent != NULL )
 428                         context_push_service( context, parent, type );
 429
 430                 // Create a tractor to contain the multitrack
 431                 tractor = mlt_tractor_new( );
 432                 parent = MLT_TRACTOR_SERVICE( tractor );
 433                 track_service( context->destructors, parent, (mlt_destructor) mlt_tractor_close );
 434                 mlt_properties_set_lcnumeric( MLT_SERVICE_PROPERTIES( parent ), context->lc_numeric );
 435                 type = mlt_tractor_type;
 436
 437                 // Flag it as a synthesised tractor for clean up later
 438                 mlt_properties_set_int( MLT_SERVICE_PROPERTIES( parent ), "loader_synth", 1 );
 439         }
 440
 441         if ( type == mlt_tractor_type )
 442         {
 443                 mlt_service service = MLT_SERVICE( mlt_tractor_multitrack( MLT_TRACTOR( parent ) ) );
 444                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 445                 for ( ; atts != NULL && *atts != NULL; atts += 2 )
 446                         mlt_properties_set( properties, (const char*) atts[0], atts[1] == NULL ? "" : (const char*) atts[1] );
 447
 448                 if ( mlt_properties_get( properties, "id" ) != NULL )
 449                         mlt_properties_set_data( context->producer_map, mlt_properties_get( properties,"id" ), service, 0, NULL, NULL );
 450
 451                 context_push_service( context, parent, type );
 452                 context_push_service( context, service, mlt_multitrack_type );
 453         }
 454         else
 455         {
 456                 mlt_log_error( NULL, "[producer_xml] Invalid multitrack position\n" );
 457         }
 458 }
 459
 460 static void on_end_multitrack( deserialise_context context, const xmlChar *name )
 461 {
 462         // Get the multitrack from the stack
 463         enum service_type type;
 464         mlt_service service = context_pop_service( context, &type );
 465
 466         if ( service == NULL || type != mlt_multitrack_type )
 467                 mlt_log_error( NULL, "[producer_xml] End multitrack in the wrong state...\n" );
 468 }
 469
 470 static void on_start_playlist( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 471 {
 472         mlt_playlist playlist = mlt_playlist_new( context->profile );
 473         mlt_service service = MLT_PLAYLIST_SERVICE( playlist );
 474         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 475
 476         track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
 477
 478         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 479         {
 480                 mlt_properties_set( properties, (const char*) atts[0], atts[1] == NULL ? "" : (const char*) atts[1] );
 481
 482                 // Out will be overwritten later as we append, so we need to save it
 483                 if ( xmlStrcmp( atts[ 0 ], _x("out") ) == 0 )
 484                         mlt_properties_set( properties, "_xml.out", ( const char* )atts[ 1 ] );
 485         }
 486
 487         if ( mlt_properties_get( properties, "id" ) != NULL )
 488                 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
 489
 490         context_push_service( context, service, mlt_playlist_type );
 491 }
 492
 493 static void on_end_playlist( deserialise_context context, const xmlChar *name )
 494 {
 495         // Get the playlist from the stack
 496         enum service_type type;
 497         mlt_service service = context_pop_service( context, &type );
 498
 499         if ( service != NULL && type == mlt_playlist_type )
 500         {
 501                 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 502                 mlt_position in = -1;
 503                 mlt_position out = -1;
 504
 505                 if ( mlt_properties_get( properties, "in" ) )
 506                         in = mlt_properties_get_position( properties, "in" );
 507                 if ( mlt_properties_get( properties, "out" ) )
 508                         out = mlt_properties_get_position( properties, "out" );
 509
 510                 // See if the playlist should be added to a playlist or multitrack
 511                 if ( add_producer( context, service, in, out ) == 0 )
 512                         context_push_service( context, service, type );
 513         }
 514         else
 515         {
 516                 mlt_log_error( NULL, "[producer_xml] Invalid state of playlist end %d\n", type );
 517         }
 518 }
 519
 520 static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 521 {
 522         // use a dummy service to hold properties to allow arbitrary nesting
 523         mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
 524         mlt_service_init( service, NULL );
 525
 526         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 527
 528         context_push_service( context, service, mlt_dummy_producer_type );
 529
 530         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 531                 mlt_properties_set( properties, (const char*) atts[0], atts[1] == NULL ? "" : (const char*) atts[1] );
 532 }
 533
 534 static void on_end_producer( deserialise_context context, const xmlChar *name )
 535 {
 536         enum service_type type;
 537         mlt_service service = context_pop_service( context, &type );
 538         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 539
 540         if ( service != NULL && type == mlt_dummy_producer_type )
 541         {
 542                 mlt_service producer = NULL;
 543
 544                 qualify_property( context, properties, "resource" );
 545                 char *resource = trim( mlt_properties_get( properties, "resource" ) );
 546
 547                 // Let Kino-SMIL src be a synonym for resource
 548                 if ( resource == NULL )
 549                 {
 550                         qualify_property( context, properties, "src" );
 551                         resource = trim( mlt_properties_get( properties, "src" ) );
 552                 }
 553
 554                 // Instantiate the producer
 555                 if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
 556                 {
 557                         char *service_name = trim( mlt_properties_get( properties, "mlt_service" ) );
 558                         if ( resource )
 559                         {
 560                                 char *temp = calloc( 1, strlen( service_name ) + strlen( resource ) + 2 );
 561                                 strcat( temp, service_name );
 562                                 strcat( temp, ":" );
 563                                 strcat( temp, resource );
 564                                 producer = MLT_SERVICE( mlt_factory_producer( context->profile, NULL, temp ) );
 565                                 free( temp );
 566                         }
 567                         else
 568                         {
 569                                 producer = MLT_SERVICE( mlt_factory_producer( context->profile, NULL, service_name ) );
 570                         }
 571                 }
 572
 573                 // Just in case the plugin requested doesn't exist...
 574                 if ( !producer && resource )
 575                         producer = MLT_SERVICE( mlt_factory_producer( context->profile, NULL, resource ) );
 576                 if ( !producer )
 577                         mlt_log_error( NULL, "[producer_xml] failed to load producer \"%s\"\n", resource );
 578                 if ( !producer )
 579                         producer = MLT_SERVICE( mlt_factory_producer( context->profile, NULL, "+INVALID.txt" ) );
 580                 if ( !producer )
 581                         producer = MLT_SERVICE( mlt_factory_producer( context->profile, NULL, "colour:red" ) );
 582                 if ( !producer )
 583                 {
 584                         mlt_service_close( service );
 585                         return;
 586                 }
 587
 588                 // Track this producer
 589                 track_service( context->destructors, producer, (mlt_destructor) mlt_producer_close );
 590                 mlt_properties_set_lcnumeric( MLT_SERVICE_PROPERTIES( producer ), context->lc_numeric );
 591                 context->seekable &= mlt_properties_get_int( MLT_SERVICE_PROPERTIES( producer ), "seekable" );
 592
 593                 // Propagate the properties
 594                 qualify_property( context, properties, "resource" );
 595                 qualify_property( context, properties, "luma" );
 596                 qualify_property( context, properties, "luma.resource" );
 597                 qualify_property( context, properties, "composite.luma" );
 598                 qualify_property( context, properties, "producer.resource" );
 599
 600                 // Handle in/out properties separately
 601                 mlt_position in = -1;
 602                 mlt_position out = -1;
 603
 604                 // Get in
 605                 if ( mlt_properties_get( properties, "in" ) )
 606                         in = mlt_properties_get_position( properties, "in" );
 607                 // Let Kino-SMIL clipBegin be a synonym for in
 608                 else if ( mlt_properties_get( properties, "clipBegin" ) )
 609                         in = mlt_properties_get_position( properties, "clipBegin" );
 610                 // Get out
 611                 if ( mlt_properties_get( properties, "out" ) )
 612                         out = mlt_properties_get_position( properties, "out" );
 613                 // Let Kino-SMIL clipEnd be a synonym for out
 614                 else if ( mlt_properties_get( properties, "clipEnd" ) )
 615                         out = mlt_properties_get_position( properties, "clipEnd" );
 616                 // Remove in and out
 617                 mlt_properties_set( properties, "in", NULL );
 618                 mlt_properties_set( properties, "out", NULL );
 619
 620                 // Inherit the properties
 621                 mlt_properties_inherit( MLT_SERVICE_PROPERTIES( producer ), properties );
 622
 623                 // Attach all filters from service onto producer
 624                 attach_filters( producer, service );
 625
 626                 // Add the producer to the producer map
 627                 if ( mlt_properties_get( properties, "id" ) != NULL )
 628                         mlt_properties_set_data( context->producer_map, mlt_properties_get(properties, "id"), producer, 0, NULL, NULL );
 629
 630                 // See if the producer should be added to a playlist or multitrack
 631                 if ( add_producer( context, producer, in, out ) == 0 )
 632                 {
 633                         // Otherwise, set in and out on...
 634                         if ( in != -1 || out != -1 )
 635                         {
 636                                 // Get the parent service
 637                                 enum service_type type;
 638                                 mlt_service parent = context_pop_service( context, &type );
 639                                 if ( parent != NULL )
 640                                 {
 641                                         // Get the parent properties
 642                                         properties = MLT_SERVICE_PROPERTIES( parent );
 643
 644                                         char *resource = trim( mlt_properties_get( properties, "resource" ) );
 645
 646                                         // Put the parent producer back
 647                                         context_push_service( context, parent, type );
 648
 649                                         // If the parent is a track or entry
 650                                         if ( resource && ( strcmp( resource, "<entry>" ) == 0 ) )
 651                                         {
 652                                                 if ( in > -1 ) mlt_properties_set_position( properties, "in", in );
 653                                                 if ( out > -1 ) mlt_properties_set_position( properties, "out", out );
 654                                         }
 655                                         else
 656                                         {
 657                                                 // Otherwise, set in and out on producer directly
 658                                                 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
 659                                         }
 660                                 }
 661                                 else
 662                                 {
 663                                         // Otherwise, set in and out on producer directly
 664                                         mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
 665                                 }
 666                         }
 667
 668                         // Push the producer onto the stack
 669                         context_push_service( context, producer, mlt_producer_type );
 670                 }
 671
 672                 mlt_service_close( service );
 673         }
 674 }
 675
 676 static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 677 {
 678         // Get the playlist from the stack
 679         enum service_type type;
 680         mlt_service service = context_pop_service( context, &type );
 681
 682         if ( type == mlt_playlist_type && service != NULL )
 683         {
 684                 // Look for the length attribute
 685                 for ( ; atts != NULL && *atts != NULL; atts += 2 )
 686                 {
 687                         if ( xmlStrcmp( atts[0], _x("length") ) == 0 )
 688                         {
 689                                 // Append a blank to the playlist
 690                                 mlt_playlist_blank_time( MLT_PLAYLIST( service ), _s(atts[1]) );
 691                                 break;
 692                         }
 693                 }
 694
 695                 // Push the playlist back onto the stack
 696                 context_push_service( context, service, type );
 697         }
 698         else
 699         {
 700                 mlt_log_error( NULL, "[producer_xml] blank without a playlist - a definite no no\n" );
 701         }
 702 }
 703
 704 static void on_start_entry( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 705 {
 706         mlt_producer entry = NULL;
 707         mlt_properties temp = mlt_properties_new( );
 708         mlt_properties_set_data( temp, "_profile", context->profile, 0, NULL, NULL );
 709         mlt_properties_set_lcnumeric( temp, context->lc_numeric );
 710
 711         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 712         {
 713                 mlt_properties_set( temp, (const char*) atts[0], atts[1] == NULL ? "" : (const char*) atts[1] );
 714
 715                 // Look for the producer attribute
 716                 if ( xmlStrcmp( atts[ 0 ], _x("producer") ) == 0 )
 717                 {
 718                         mlt_producer producer = mlt_properties_get_data( context->producer_map, (const char*) atts[1], NULL );
 719                         if ( producer !=  NULL )
 720                                 mlt_properties_set_data( temp, "producer", producer, 0, NULL, NULL );
 721                 }
 722         }
 723
 724         // If we have a valid entry
 725         if ( mlt_properties_get_data( temp, "producer", NULL ) != NULL )
 726         {
 727                 mlt_playlist_clip_info info;
 728                 enum service_type parent_type = invalid_type;
 729                 mlt_service parent = context_pop_service( context, &parent_type );
 730                 mlt_producer producer = mlt_properties_get_data( temp, "producer", NULL );
 731
 732                 if ( parent_type == mlt_playlist_type )
 733                 {
 734                         // Append the producer to the playlist
 735                         mlt_position in = -1;
 736                         mlt_position out = -1;
 737                         if ( mlt_properties_get( temp, "in" ) )
 738                                 in = mlt_properties_get_position( temp, "in" );
 739                         if ( mlt_properties_get( temp, "out" ) )
 740                                 out = mlt_properties_get_position( temp, "out" );
 741                         mlt_playlist_append_io( MLT_PLAYLIST( parent ), producer, in, out );
 742
 743                         // Handle the repeat property
 744                         if ( mlt_properties_get_int( temp, "repeat" ) > 0 )
 745                         {
 746                                 mlt_playlist_repeat_clip( MLT_PLAYLIST( parent ),
 747                                                                                   mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1,
 748                                                                                   mlt_properties_get_int( temp, "repeat" ) );
 749                         }
 750
 751                         mlt_playlist_get_clip_info( MLT_PLAYLIST( parent ), &info, mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1 );
 752                         entry = info.cut;
 753                 }
 754                 else
 755                 {
 756                         mlt_log_error( NULL, "[producer_xml] Entry not part of a playlist...\n" );
 757                 }
 758
 759                 context_push_service( context, parent, parent_type );
 760         }
 761
 762         // Push the cut onto the stack
 763         context_push_service( context, MLT_PRODUCER_SERVICE( entry ), mlt_entry_type );
 764
 765         mlt_properties_close( temp );
 766 }
 767
 768 static void on_end_entry( deserialise_context context, const xmlChar *name )
 769 {
 770         // Get the entry from the stack
 771         enum service_type entry_type = invalid_type;
 772         mlt_service entry = context_pop_service( context, &entry_type );
 773
 774         if ( entry == NULL && entry_type != mlt_entry_type )
 775         {
 776                 mlt_log_error( NULL, "[producer_xml] Invalid state at end of entry\n" );
 777         }
 778 }
 779
 780 static void on_start_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 781 {
 782         // use a dummy service to hold properties to allow arbitrary nesting
 783         mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
 784         mlt_service_init( service, NULL );
 785
 786         // Push the dummy service onto the stack
 787         context_push_service( context, service, mlt_entry_type );
 788
 789         mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "resource", "<track>" );
 790
 791         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 792         {
 793                 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (const char*) atts[0], atts[1] == NULL ? "" : (const char*) atts[1] );
 794
 795                 // Look for the producer attribute
 796                 if ( xmlStrcmp( atts[ 0 ], _x("producer") ) == 0 )
 797                 {
 798                         mlt_producer producer = mlt_properties_get_data( context->producer_map, (const char*) atts[1], NULL );
 799                         if ( producer !=  NULL )
 800                                 mlt_properties_set_data( MLT_SERVICE_PROPERTIES( service ), "producer", producer, 0, NULL, NULL );
 801                 }
 802         }
 803 }
 804
 805 static void on_end_track( deserialise_context context, const xmlChar *name )
 806 {
 807         // Get the track from the stack
 808         enum service_type track_type;
 809         mlt_service track = context_pop_service( context, &track_type );
 810
 811         if ( track != NULL && track_type == mlt_entry_type )
 812         {
 813                 mlt_properties track_props = MLT_SERVICE_PROPERTIES( track );
 814                 enum service_type parent_type = invalid_type;
 815                 mlt_service parent = context_pop_service( context, &parent_type );
 816                 mlt_multitrack multitrack = NULL;
 817
 818                 mlt_producer producer = mlt_properties_get_data( track_props, "producer", NULL );
 819                 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 820
 821                 if ( parent_type == mlt_tractor_type )
 822                         multitrack = mlt_tractor_multitrack( MLT_TRACTOR( parent ) );
 823                 else if ( parent_type == mlt_multitrack_type )
 824                         multitrack = MLT_MULTITRACK( parent );
 825                 else
 826                         mlt_log_error( NULL, "[producer_xml] track contained in an invalid container\n" );
 827
 828                 if ( multitrack != NULL )
 829                 {
 830                         // Set producer i/o if specified
 831                         if ( mlt_properties_get( track_props, "in" ) != NULL ||
 832                                  mlt_properties_get( track_props, "out" ) != NULL )
 833                         {
 834                                 mlt_position in = -1;
 835                                 mlt_position out = -1;
 836                                 if ( mlt_properties_get( track_props, "in" ) )
 837                                         in = mlt_properties_get_position( track_props, "in" );
 838                                 if ( mlt_properties_get( track_props, "out" ) )
 839                                         out = mlt_properties_get_position( track_props, "out" );
 840                                 mlt_producer cut = mlt_producer_cut( MLT_PRODUCER( producer ), in, out );
 841                                 mlt_multitrack_connect( multitrack, cut, mlt_multitrack_count( multitrack ) );
 842                                 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( cut ), track_props );
 843                                 track_props = MLT_PRODUCER_PROPERTIES( cut );
 844                                 mlt_producer_close( cut );
 845                         }
 846                         else
 847                         {
 848                                 mlt_multitrack_connect( multitrack, producer, mlt_multitrack_count( multitrack ) );
 849                         }
 850
 851                         // Set the hide state of the track producer
 852                         char *hide_s = mlt_properties_get( track_props, "hide" );
 853                         if ( hide_s != NULL )
 854                         {
 855                                 if ( strcmp( hide_s, "video" ) == 0 )
 856                                         mlt_properties_set_int( producer_props, "hide", 1 );
 857                                 else if ( strcmp( hide_s, "audio" ) == 0 )
 858                                         mlt_properties_set_int( producer_props, "hide", 2 );
 859                                 else if ( strcmp( hide_s, "both" ) == 0 )
 860                                         mlt_properties_set_int( producer_props, "hide", 3 );
 861                         }
 862                 }
 863
 864                 if ( parent != NULL )
 865                         context_push_service( context, parent, parent_type );
 866
 867                 mlt_service_close( track );
 868         }
 869         else
 870         {
 871                 mlt_log_error( NULL, "[producer_xml] Invalid state at end of track\n" );
 872         }
 873 }
 874
 875 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 876 {
 877         // use a dummy service to hold properties to allow arbitrary nesting
 878         mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
 879         mlt_service_init( service, NULL );
 880
 881         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 882
 883         context_push_service( context, service, mlt_dummy_filter_type );
 884
 885         // Set the properties
 886         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 887                 mlt_properties_set( properties, (const char*) atts[0], (const char*) atts[1] );
 888 }
 889
 890 static void on_end_filter( deserialise_context context, const xmlChar *name )
 891 {
 892         enum service_type type;
 893         mlt_service service = context_pop_service( context, &type );
 894         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 895
 896         enum service_type parent_type = invalid_type;
 897         mlt_service parent = context_pop_service( context, &parent_type );
 898
 899         if ( service != NULL && type == mlt_dummy_filter_type )
 900         {
 901                 char *id = trim( mlt_properties_get( properties, "mlt_service" ) );
 902                 mlt_service filter = MLT_SERVICE( mlt_factory_filter( context->profile, id, NULL ) );
 903                 mlt_properties filter_props = MLT_SERVICE_PROPERTIES( filter );
 904
 905                 if ( !filter )
 906                 {
 907                         mlt_log_error( NULL, "[producer_xml] failed to load filter \"%s\"\n", id );
 908                         if ( parent )
 909                                 context_push_service( context, parent, parent_type );
 910                         mlt_service_close( service );
 911                         return;
 912                 }
 913
 914                 track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
 915                 mlt_properties_set_lcnumeric( MLT_SERVICE_PROPERTIES( filter ), context->lc_numeric );
 916
 917                 // Propogate the properties
 918                 qualify_property( context, properties, "resource" );
 919                 qualify_property( context, properties, "luma" );
 920                 qualify_property( context, properties, "luma.resource" );
 921                 qualify_property( context, properties, "composite.luma" );
 922                 qualify_property( context, properties, "producer.resource" );
 923                 mlt_properties_inherit( filter_props, properties );
 924
 925                 // Attach all filters from service onto filter
 926                 attach_filters( filter, service );
 927
 928                 // Associate the filter with the parent
 929                 if ( parent != NULL )
 930                 {
 931                         if ( parent_type == mlt_tractor_type )
 932                         {
 933                                 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
 934                                 mlt_field_plant_filter( field, MLT_FILTER( filter ), mlt_properties_get_int( properties, "track" ) );
 935                                 mlt_filter_set_in_and_out( MLT_FILTER( filter ),
 936                                                                                    mlt_properties_get_int( properties, "in" ),
 937                                                                                    mlt_properties_get_int( properties, "out" ) );
 938                         }
 939                         else
 940                         {
 941                                 mlt_service_attach( parent, MLT_FILTER( filter ) );
 942                         }
 943
 944                         // Put the parent back on the stack
 945                         context_push_service( context, parent, parent_type );
 946                 }
 947                 else
 948                 {
 949                         mlt_log_error( NULL, "[producer_xml] filter closed with invalid parent...\n" );
 950                 }
 951
 952                 // Close the dummy filter service
 953                 mlt_service_close( service );
 954         }
 955         else
 956         {
 957                 mlt_log_error( NULL, "[producer_xml] Invalid top of stack on filter close\n" );
 958         }
 959 }
 960
 961 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
 962 {
 963         // use a dummy service to hold properties to allow arbitrary nesting
 964         mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
 965         mlt_service_init( service, NULL );
 966
 967         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 968
 969         context_push_service( context, service, mlt_dummy_transition_type );
 970
 971         // Set the properties
 972         for ( ; atts != NULL && *atts != NULL; atts += 2 )
 973                 mlt_properties_set( properties, (const char*) atts[0], (const char*) atts[1] );
 974 }
 975
 976 static void on_end_transition( deserialise_context context, const xmlChar *name )
 977 {
 978         enum service_type type;
 979         mlt_service service = context_pop_service( context, &type );
 980         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
 981
 982         enum service_type parent_type = invalid_type;
 983         mlt_service parent = context_pop_service( context, &parent_type );
 984
 985         if ( service != NULL && type == mlt_dummy_transition_type )
 986         {
 987                 char *id = trim( mlt_properties_get( properties, "mlt_service" ) );
 988                 mlt_service effect = MLT_SERVICE( mlt_factory_transition( context->profile, id, NULL ) );
 989                 mlt_properties effect_props = MLT_SERVICE_PROPERTIES( effect );
 990
 991                 if ( !effect )
 992                 {
 993                         mlt_log_error( NULL, "[producer_xml] failed to load transition \"%s\"\n", id );
 994                         if ( parent )
 995                                 context_push_service( context, parent, parent_type );
 996                         mlt_service_close( service );
 997                         return;
 998                 }
 999                 track_service( context->destructors, effect, (mlt_destructor) mlt_transition_close );
1000                 mlt_properties_set_lcnumeric( MLT_SERVICE_PROPERTIES( effect ), context->lc_numeric );
1001
1002                 // Propogate the properties
1003                 qualify_property( context, properties, "resource" );
1004                 qualify_property( context, properties, "luma" );
1005                 qualify_property( context, properties, "luma.resource" );
1006                 qualify_property( context, properties, "composite.luma" );
1007                 qualify_property( context, properties, "producer.resource" );
1008                 mlt_properties_inherit( effect_props, properties );
1009
1010                 // Attach all filters from service onto effect
1011                 attach_filters( effect, service );
1012
1013                 // Associate the filter with the parent
1014                 if ( parent != NULL )
1015                 {
1016                         if ( parent_type == mlt_tractor_type )
1017                         {
1018                                 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
1019                                 if ( mlt_properties_get_int( properties, "a_track" ) == mlt_properties_get_int( properties, "b_track" ) )
1020                                         mlt_properties_set_int( properties, "b_track", mlt_properties_get_int( properties, "a_track" ) + 1 );
1021                                 mlt_field_plant_transition( field, MLT_TRANSITION( effect ),
1022                                                                                         mlt_properties_get_int( properties, "a_track" ),
1023                                                                                         mlt_properties_get_int( properties, "b_track" ) );
1024                                 mlt_transition_set_in_and_out( MLT_TRANSITION( effect ),
1025                                                                                    mlt_properties_get_int( properties, "in" ),
1026                                                                                    mlt_properties_get_int( properties, "out" ) );
1027                         }
1028                         else
1029                         {
1030                                 mlt_log_warning( NULL, "[producer_xml] Misplaced transition - ignoring\n" );
1031                         }
1032
1033                         // Put the parent back on the stack
1034                         context_push_service( context, parent, parent_type );
1035                 }
1036                 else
1037                 {
1038                         mlt_log_error( NULL, "[producer_xml] transition closed with invalid parent...\n" );
1039                 }
1040
1041                 // Close the dummy filter service
1042                 mlt_service_close( service );
1043         }
1044         else
1045         {
1046                 mlt_log_error( NULL, "[producer_xml] Invalid top of stack on transition close\n" );
1047         }
1048 }
1049
1050 static void on_start_consumer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
1051 {
1052         if ( context->pass == 1 )
1053         {
1054                 mlt_consumer consumer = mlt_consumer_new( context->profile );
1055                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
1056
1057                 mlt_properties_set_lcnumeric( properties, context->lc_numeric );
1058                 context_push_service( context, MLT_CONSUMER_SERVICE(consumer), mlt_dummy_consumer_type );
1059
1060                 // Set the properties from attributes
1061                 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1062                         mlt_properties_set( properties, (const char*) atts[0], (const char*) atts[1] );
1063         }
1064 }
1065
1066 static void on_end_consumer( deserialise_context context, const xmlChar *name )
1067 {
1068         if ( context->pass == 1 )
1069         {
1070                 // Get the consumer from the stack
1071                 enum service_type type;
1072                 mlt_service service = context_pop_service( context, &type );
1073
1074                 if ( service && type == mlt_dummy_consumer_type )
1075                 {
1076                         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1077                         qualify_property( context, properties, "resource" );
1078                         qualify_property( context, properties, "target" );
1079                         char *resource = trim( mlt_properties_get( properties, "resource" ) );
1080
1081                         if ( context->multi_consumer > 1 )
1082                         {
1083                                 // Instantiate the multi consumer
1084                                 if ( !context->consumer )
1085                                 {
1086                                         context->consumer = mlt_factory_consumer( context->profile, "multi", NULL );
1087                                         if ( context->consumer )
1088                                         {
1089                                                 // Track this consumer
1090                                                 track_service( context->destructors, MLT_CONSUMER_SERVICE(context->consumer), (mlt_destructor) mlt_consumer_close );
1091                                                 mlt_properties_set_lcnumeric( MLT_CONSUMER_PROPERTIES(context->consumer), context->lc_numeric );
1092                                         }
1093                                 }
1094                                 if ( context->consumer )
1095                                 {
1096                                         // Set this service instance on multi consumer
1097                                         char key[20];
1098                                         snprintf( key, sizeof(key), "%d", context->consumer_count++ );
1099                                         mlt_properties_set_data( MLT_CONSUMER_PROPERTIES(context->consumer), key, service, 0,
1100                                                 (mlt_destructor) mlt_service_close, NULL );
1101                                 }
1102                         }
1103                         else
1104                         {
1105                                 // Instantiate the consumer
1106                                 char *id = trim( mlt_properties_get( properties, "mlt_service" ) );
1107                                 context->consumer = mlt_factory_consumer( context->profile, id, resource );
1108                                 if ( context->consumer )
1109                                 {
1110                                         // Track this consumer
1111                                         track_service( context->destructors, MLT_CONSUMER_SERVICE(context->consumer), (mlt_destructor) mlt_consumer_close );
1112                                         mlt_properties_set_lcnumeric( MLT_CONSUMER_PROPERTIES(context->consumer), context->lc_numeric );
1113
1114                                         // Inherit the properties
1115                                         mlt_properties_inherit( MLT_CONSUMER_PROPERTIES(context->consumer), properties );
1116                                 }
1117                                 // Close the dummy
1118                                 mlt_service_close( service );
1119                         }
1120                 }
1121         }
1122 }
1123
1124 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
1125 {
1126         enum service_type type;
1127         mlt_service service = context_pop_service( context, &type );
1128         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1129         const char *value = NULL;
1130
1131         if ( service != NULL )
1132         {
1133                 // Set the properties
1134                 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1135                 {
1136                         if ( xmlStrcmp( atts[ 0 ], _x("name") ) == 0 )
1137                                 context->property = strdup( _s(atts[ 1 ]) );
1138                         else if ( xmlStrcmp( atts[ 0 ], _x("value") ) == 0 )
1139                                 value = _s(atts[ 1 ]);
1140                 }
1141
1142                 if ( context->property != NULL )
1143                         mlt_properties_set( properties, context->property, value == NULL ? "" : value );
1144
1145                 // Tell parser to collect any further nodes for serialisation
1146                 context->is_value = 1;
1147
1148                 context_push_service( context, service, type );
1149         }
1150         else
1151         {
1152                 mlt_log_error( NULL, "[producer_xml] Property without a service '%s'?\n", ( const char * )name );
1153         }
1154 }
1155
1156 static void on_end_property( deserialise_context context, const xmlChar *name )
1157 {
1158         enum service_type type;
1159         mlt_service service = context_pop_service( context, &type );
1160         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1161
1162         if ( service != NULL )
1163         {
1164                 // Tell parser to stop building a tree
1165                 context->is_value = 0;
1166
1167                 // See if there is a xml tree for the value
1168                 if ( context->property != NULL && context->value_doc != NULL )
1169                 {
1170                         xmlChar *value;
1171                         int size;
1172
1173                         // Serialise the tree to get value
1174                         xmlDocDumpMemory( context->value_doc, &value, &size );
1175                         mlt_properties_set( properties, context->property, _s(value) );
1176 #ifdef WIN32
1177                         xmlFreeFunc xmlFree = NULL;
1178                         xmlMemGet( &xmlFree, NULL, NULL, NULL);
1179 #endif
1180                         xmlFree( value );
1181                         xmlFreeDoc( context->value_doc );
1182                         context->value_doc = NULL;
1183                 }
1184
1185                 // Close this property handling
1186                 free( context->property );
1187                 context->property = NULL;
1188
1189                 context_push_service( context, service, type );
1190         }
1191         else
1192         {
1193                 mlt_log_error( NULL, "[producer_xml] Property without a service '%s'??\n", (const char *)name );
1194         }
1195 }
1196
1197 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
1198 {
1199         struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1200         deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1201
1202         if ( context->pass == 0 )
1203         {
1204                 if ( xmlStrcmp( name, _x("mlt") ) == 0 ||
1205                      xmlStrcmp( name, _x("profile") ) == 0 ||
1206                      xmlStrcmp( name, _x("profileinfo") ) == 0 )
1207                         on_start_profile( context, name, atts );
1208                 if ( xmlStrcmp( name, _x("consumer") ) == 0 )
1209                         context->multi_consumer++;
1210                 return;
1211         }
1212         context->branch[ context->depth ] ++;
1213         context->depth ++;
1214
1215         // Build a tree from nodes within a property value
1216         if ( context->is_value == 1 && context->pass == 1 )
1217         {
1218                 xmlNodePtr node = xmlNewNode( NULL, name );
1219
1220                 if ( context->value_doc == NULL )
1221                 {
1222                         // Start a new tree
1223                         context->value_doc = xmlNewDoc( _x("1.0") );
1224                         xmlDocSetRootElement( context->value_doc, node );
1225                 }
1226                 else
1227                 {
1228                         // Append child to tree
1229                         xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node );
1230                 }
1231                 context_push_node( context, node );
1232
1233                 // Set the attributes
1234                 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1235                         xmlSetProp( node, atts[ 0 ], atts[ 1 ] );
1236         }
1237         else if ( xmlStrcmp( name, _x("tractor") ) == 0 )
1238                 on_start_tractor( context, name, atts );
1239         else if ( xmlStrcmp( name, _x("multitrack") ) == 0 )
1240                 on_start_multitrack( context, name, atts );
1241         else if ( xmlStrcmp( name, _x("playlist") ) == 0 || xmlStrcmp( name, _x("seq") ) == 0 || xmlStrcmp( name, _x("smil") ) == 0 )
1242                 on_start_playlist( context, name, atts );
1243         else if ( xmlStrcmp( name, _x("producer") ) == 0 || xmlStrcmp( name, _x("video") ) == 0 )
1244                 on_start_producer( context, name, atts );
1245         else if ( xmlStrcmp( name, _x("blank") ) == 0 )
1246                 on_start_blank( context, name, atts );
1247         else if ( xmlStrcmp( name, _x("entry") ) == 0 )
1248                 on_start_entry( context, name, atts );
1249         else if ( xmlStrcmp( name, _x("track") ) == 0 )
1250                 on_start_track( context, name, atts );
1251         else if ( xmlStrcmp( name, _x("filter") ) == 0 )
1252                 on_start_filter( context, name, atts );
1253         else if ( xmlStrcmp( name, _x("transition") ) == 0 )
1254                 on_start_transition( context, name, atts );
1255         else if ( xmlStrcmp( name, _x("property") ) == 0 )
1256                 on_start_property( context, name, atts );
1257         else if ( xmlStrcmp( name, _x("consumer") ) == 0 )
1258                 on_start_consumer( context, name, atts );
1259         else if ( xmlStrcmp( name, _x("westley") ) == 0 || xmlStrcmp( name, _x("mlt") ) == 0 )
1260         {
1261                 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1262                 {
1263                         if ( xmlStrcmp( atts[0], _x("LC_NUMERIC") ) )
1264                                 mlt_properties_set( context->producer_map, _s( atts[0] ), _s(atts[1] ) );
1265                         else if ( !context->lc_numeric )
1266                                 context->lc_numeric = strdup( _s( atts[1] ) );
1267                 }
1268         }
1269 }
1270
1271 static void on_end_element( void *ctx, const xmlChar *name )
1272 {
1273         struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1274         deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1275
1276         if ( context->is_value == 1 && context->pass == 1 && xmlStrcmp( name, _x("property") ) != 0 )
1277                 context_pop_node( context );
1278         else if ( xmlStrcmp( name, _x("multitrack") ) == 0 )
1279                 on_end_multitrack( context, name );
1280         else if ( xmlStrcmp( name, _x("playlist") ) == 0 || xmlStrcmp( name, _x("seq") ) == 0 || xmlStrcmp( name, _x("smil") ) == 0 )
1281                 on_end_playlist( context, name );
1282         else if ( xmlStrcmp( name, _x("track") ) == 0 )
1283                 on_end_track( context, name );
1284         else if ( xmlStrcmp( name, _x("entry") ) == 0 )
1285                 on_end_entry( context, name );
1286         else if ( xmlStrcmp( name, _x("tractor") ) == 0 )
1287                 on_end_tractor( context, name );
1288         else if ( xmlStrcmp( name, _x("property") ) == 0 )
1289                 on_end_property( context, name );
1290         else if ( xmlStrcmp( name, _x("producer") ) == 0 || xmlStrcmp( name, _x("video") ) == 0 )
1291                 on_end_producer( context, name );
1292         else if ( xmlStrcmp( name, _x("filter") ) == 0 )
1293                 on_end_filter( context, name );
1294         else if ( xmlStrcmp( name, _x("transition") ) == 0 )
1295                 on_end_transition( context, name );
1296         else if ( xmlStrcmp( name, _x("consumer") ) == 0 )
1297                 on_end_consumer( context, name );
1298
1299         context->branch[ context->depth ] = 0;
1300         context->depth --;
1301 }
1302
1303 static void on_characters( void *ctx, const xmlChar *ch, int len )
1304 {
1305         struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1306         deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1307         char *value = calloc( 1, len + 1 );
1308         enum service_type type;
1309         mlt_service service = context_pop_service( context, &type );
1310         mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1311
1312         if ( service != NULL )
1313                 context_push_service( context, service, type );
1314
1315         value[ len ] = 0;
1316         strncpy( value, (const char*) ch, len );
1317
1318         if ( context->stack_node_size > 0 )
1319                 xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value );
1320
1321         // libxml2 generates an on_characters immediately after a get_entity within
1322         // an element value, and we ignore it because it is called again during
1323         // actual substitution.
1324         else if ( context->property != NULL && context->entity_is_replace == 0 )
1325         {
1326                 char *s = mlt_properties_get( properties, context->property );
1327                 if ( s != NULL )
1328                 {
1329                         // Append new text to existing content
1330                         char *new = calloc( 1, strlen( s ) + len + 1 );
1331                         strcat( new, s );
1332                         strcat( new, value );
1333                         mlt_properties_set( properties, context->property, new );
1334                         free( new );
1335                 }
1336                 else
1337                         mlt_properties_set( properties, context->property, value );
1338         }
1339         context->entity_is_replace = 0;
1340
1341         free( value);
1342 }
1343
1344 /** Convert parameters parsed from resource into entity declarations.
1345 */
1346 static void params_to_entities( deserialise_context context )
1347 {
1348         if ( context->params != NULL )
1349         {
1350                 int i;
1351
1352                 // Add our params as entitiy declarations
1353                 for ( i = 0; i < mlt_properties_count( context->params ); i++ )
1354                 {
1355                         xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i );
1356                         xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY,
1357                                 context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, _s(name) ) );
1358                 }
1359
1360                 // Flag completion
1361                 mlt_properties_close( context->params );
1362                 context->params = NULL;
1363         }
1364 }
1365
1366 // The following 3 facilitate entity substitution in the SAX parser
1367 static void on_internal_subset( void *ctx, const xmlChar* name,
1368         const xmlChar* publicId, const xmlChar* systemId )
1369 {
1370         struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1371         deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1372
1373         context->publicId = publicId;
1374         context->systemId = systemId;
1375         xmlCreateIntSubset( context->entity_doc, name, publicId, systemId );
1376
1377         // Override default entities with our parameters
1378         params_to_entities( context );
1379 }
1380
1381 // TODO: Check this with Dan... I think this is for parameterisation
1382 // but it's breaking standard escaped entities (like &lt; etc).
1383 static void on_entity_declaration( void *ctx, const xmlChar* name, int type,
1384         const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
1385 {
1386         struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1387         deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1388
1389         xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content );
1390 }
1391
1392 // TODO: Check this functionality (see on_entity_declaration)
1393 static xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name )
1394 {
1395         struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1396         deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1397         xmlEntityPtr e = NULL;
1398
1399         // Setup for entity declarations if not ready
1400         if ( xmlGetIntSubset( context->entity_doc ) == NULL )
1401         {
1402                 xmlCreateIntSubset( context->entity_doc, _x("mlt"), _x(""), _x("") );
1403                 context->publicId = _x("");
1404                 context->systemId = _x("");
1405         }
1406
1407         // Add our parameters if not already
1408         params_to_entities( context );
1409
1410         e = xmlGetPredefinedEntity( name );
1411
1412         // Send signal to on_characters that an entity substitutin is pending
1413         if ( e == NULL )
1414         {
1415                 e = xmlGetDocEntity( context->entity_doc, name );
1416                 if ( e != NULL )
1417                         context->entity_is_replace = 1;
1418         }
1419
1420         return e;
1421 }
1422
1423 static void     on_error( void * ctx, const char * msg, ... )
1424 {
1425         struct _xmlError* err_ptr = xmlCtxtGetLastError( ctx );
1426
1427         switch( err_ptr->level )
1428         {
1429         case XML_ERR_WARNING:
1430                 mlt_log_warning( NULL, "[producer_xml] parse warning: %s\trow: %d\tcol: %d\n",
1431                                          err_ptr->message, err_ptr->line, err_ptr->int2 );
1432                 break;
1433         case XML_ERR_ERROR:
1434                 mlt_log_error( NULL, "[producer_xml] parse error: %s\trow: %d\tcol: %d\n",
1435                                        err_ptr->message, err_ptr->line, err_ptr->int2 );
1436                 break;
1437         default:
1438         case XML_ERR_FATAL:
1439                 mlt_log_fatal( NULL, "[producer_xml] parse fatal: %s\trow: %d\tcol: %d\n",
1440                                        err_ptr->message, err_ptr->line, err_ptr->int2 );
1441                 break;
1442         }
1443 }
1444
1445 /** Convert a hexadecimal character to its value.
1446 */
1447 static int tohex( char p )
1448 {
1449         return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10;
1450 }
1451
1452 /** Decode a url-encoded string containing hexadecimal character sequences.
1453 */
1454 static char *url_decode( char *dest, char *src )
1455 {
1456         char *p = dest;
1457
1458         while ( *src )
1459         {
1460                 if ( *src == '%' )
1461                 {
1462                         *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) );
1463                         src += 3;
1464                 }
1465                 else
1466                 {
1467                         *p ++ = *src ++;
1468                 }
1469         }
1470
1471         *p = *src;
1472         return dest;
1473 }
1474
1475 /** Extract the filename from a URL attaching parameters to a properties list.
1476 */
1477 static void parse_url( mlt_properties properties, char *url )
1478 {
1479         int i;
1480         int n = strlen( url );
1481         char *name = NULL;
1482         char *value = NULL;
1483
1484         for ( i = 0; i < n; i++ )
1485         {
1486                 switch ( url[ i ] )
1487                 {
1488                         case '?':
1489                                 url[ i++ ] = '\0';
1490                                 name = &url[ i ];
1491                                 break;
1492
1493                         case ':':
1494                         case '=':
1495 #ifdef WIN32
1496                                 if ( url[i] == ':' && url[i + 1] != '/' )
1497                                 {
1498 #endif
1499                                         url[ i++ ] = '\0';
1500                                         value = &url[ i ];
1501 #ifdef WIN32
1502                                 }
1503 #endif
1504                                 break;
1505
1506                         case '&':
1507                                 url[ i++ ] = '\0';
1508                                 if ( name != NULL && value != NULL )
1509                                         mlt_properties_set( properties, name, value );
1510                                 name = &url[ i ];
1511                                 value = NULL;
1512                                 break;
1513                 }
1514         }
1515         if ( name != NULL && value != NULL )
1516                 mlt_properties_set( properties, name, value );
1517 }
1518
1519 // Quick workaround to avoid unecessary libxml2 warnings
1520 static int file_exists( char *file )
1521 {
1522         char *name = strdup( file );
1523         int exists = 0;
1524         if ( name != NULL && strchr( name, '?' ) )
1525                 *( strchr( name, '?' ) ) = '\0';
1526         if ( name != NULL )
1527         {
1528                 FILE *f = fopen( name, "r" );
1529                 exists = f != NULL;
1530                 if ( exists ) fclose( f );
1531         }
1532         free( name );
1533         return exists;
1534 }
1535
1536 mlt_producer producer_xml_init( mlt_profile profile, mlt_service_type servtype, const char *id, char *data )
1537 {
1538         xmlSAXHandler *sax, *sax_orig;
1539         struct deserialise_context_s *context;
1540         mlt_properties properties = NULL;
1541         int i = 0;
1542         struct _xmlParserCtxt *xmlcontext;
1543         int well_formed = 0;
1544         char *filename = NULL;
1545         int is_filename = strcmp( id, "xml-string" );
1546
1547         // Strip file:// prefix
1548         if ( data && strlen( data ) >= 7 && strncmp( data, "file://", 7 ) == 0 )
1549                 data += 7;
1550
1551         if ( data == NULL || !strcmp( data, "" ) || ( is_filename && !file_exists( data ) ) )
1552                 return NULL;
1553
1554         context = calloc( 1, sizeof( struct deserialise_context_s ) );
1555         if ( context == NULL )
1556                 return NULL;
1557
1558         context->producer_map = mlt_properties_new();
1559         context->destructors = mlt_properties_new();
1560         context->params = mlt_properties_new();
1561         context->profile = profile;
1562         context->seekable = 1;
1563
1564         // Decode URL and parse parameters
1565         mlt_properties_set( context->producer_map, "root", "" );
1566         if ( is_filename )
1567         {
1568                 filename = strdup( data );
1569                 parse_url( context->params, url_decode( filename, data ) );
1570
1571                 // We need the directory prefix which was used for the xml
1572                 if ( strchr( filename, '/' ) )
1573                 {
1574                         char *root = NULL;
1575                         mlt_properties_set( context->producer_map, "root", filename );
1576                         root = mlt_properties_get( context->producer_map, "root" );
1577                         *( strrchr( root, '/' ) ) = '\0';
1578
1579                         // If we don't have an absolute path here, we're heading for disaster...
1580                         if ( root[ 0 ] != '/' )
1581                         {
1582                                 char *cwd = getcwd( NULL, 0 );
1583                                 char *real = malloc( strlen( cwd ) + strlen( root ) + 2 );
1584                                 sprintf( real, "%s/%s", cwd, root );
1585                                 mlt_properties_set( context->producer_map, "root", real );
1586                                 free( real );
1587                                 free( cwd );
1588                         }
1589                 }
1590         }
1591
1592         // We need to track the number of registered filters
1593         mlt_properties_set_int( context->destructors, "registered", 0 );
1594
1595         // Setup SAX callbacks for first pass
1596         sax = calloc( 1, sizeof( xmlSAXHandler ) );
1597         sax->startElement = on_start_element;
1598         sax->warning = on_error;
1599         sax->error = on_error;
1600         sax->fatalError = on_error;
1601
1602         // Setup libxml2 SAX parsing
1603         xmlInitParser();
1604         xmlSubstituteEntitiesDefault( 1 );
1605         // This is used to facilitate entity substitution in the SAX parser
1606         context->entity_doc = xmlNewDoc( _x("1.0") );
1607         if ( is_filename )
1608                 xmlcontext = xmlCreateFileParserCtxt( filename );
1609         else
1610                 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1611
1612         // Invalid context - clean up and return NULL
1613         if ( xmlcontext == NULL )
1614         {
1615                 mlt_properties_close( context->producer_map );
1616                 mlt_properties_close( context->destructors );
1617                 mlt_properties_close( context->params );
1618                 free( context );
1619                 free( sax );
1620                 free( filename );
1621                 return NULL;
1622         }
1623
1624         // Parse
1625         sax_orig = xmlcontext->sax;
1626         xmlcontext->sax = sax;
1627         xmlcontext->_private = ( void* )context;
1628         xmlParseDocument( xmlcontext );
1629         well_formed = xmlcontext->wellFormed;
1630
1631         // Cleanup after parsing
1632         xmlcontext->sax = sax_orig;
1633         xmlcontext->_private = NULL;
1634         if ( xmlcontext->myDoc )
1635                 xmlFreeDoc( xmlcontext->myDoc );
1636         xmlFreeParserCtxt( xmlcontext );
1637         context->stack_node_size = 0;
1638         context->stack_service_size = 0;
1639
1640         // Bad xml - clean up and return NULL
1641         if ( !well_formed )
1642         {
1643                 mlt_properties_close( context->producer_map );
1644                 mlt_properties_close( context->destructors );
1645                 mlt_properties_close( context->params );
1646                 xmlFreeDoc( context->entity_doc );
1647                 free( context );
1648                 free( sax );
1649                 free( filename );
1650                 return NULL;
1651         }
1652
1653         // Setup the second pass
1654         context->pass ++;
1655         if ( is_filename )
1656                 xmlcontext = xmlCreateFileParserCtxt( filename );
1657         else
1658                 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1659
1660         // Invalid context - clean up and return NULL
1661         if ( xmlcontext == NULL )
1662         {
1663                 mlt_properties_close( context->producer_map );
1664                 mlt_properties_close( context->destructors );
1665                 mlt_properties_close( context->params );
1666                 xmlFreeDoc( context->entity_doc );
1667                 free( context );
1668                 free( sax );
1669                 free( filename );
1670                 return NULL;
1671         }
1672
1673         // Setup SAX callbacks for second pass
1674         sax->endElement = on_end_element;
1675         sax->characters = on_characters;
1676         sax->cdataBlock = on_characters;
1677         sax->internalSubset = on_internal_subset;
1678         sax->entityDecl = on_entity_declaration;
1679         sax->getEntity = on_get_entity;
1680
1681         // Parse
1682         sax_orig = xmlcontext->sax;
1683         xmlcontext->sax = sax;
1684         xmlcontext->_private = ( void* )context;
1685         xmlParseDocument( xmlcontext );
1686         well_formed = xmlcontext->wellFormed;
1687
1688         // Cleanup after parsing
1689         xmlFreeDoc( context->entity_doc );
1690         free( sax );
1691         xmlMemoryDump( ); // for debugging
1692         xmlcontext->sax = sax_orig;
1693         xmlcontext->_private = NULL;
1694         if ( xmlcontext->myDoc )
1695                 xmlFreeDoc( xmlcontext->myDoc );
1696         xmlFreeParserCtxt( xmlcontext );
1697
1698         // Get the last producer on the stack
1699         enum service_type type;
1700         mlt_service service = context_pop_service( context, &type );
1701         if ( well_formed && service != NULL )
1702         {
1703                 // Verify it is a producer service (mlt_type="mlt_producer")
1704                 // (producer, playlist, multitrack)
1705                 char *type = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "mlt_type" );
1706                 if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 && strcmp( type, "producer" ) != 0 ) )
1707                         service = NULL;
1708         }
1709
1710 #ifdef DEBUG
1711         xmlDocPtr doc = xml_make_doc( service );
1712         xmlDocFormatDump( stdout, doc, 1 );
1713         xmlFreeDoc( doc );
1714         service = NULL;
1715 #endif
1716
1717         if ( well_formed && service != NULL )
1718         {
1719                 char *title = mlt_properties_get( context->producer_map, "title" );
1720
1721                 // Need the complete producer list for various reasons
1722                 properties = context->destructors;
1723
1724                 // Now make sure we don't have a reference to the service in the properties
1725                 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
1726                 {
1727                         char *name = mlt_properties_get_name( properties, i );
1728                         if ( mlt_properties_get_data_at( properties, i, NULL ) == service )
1729                         {
1730                                 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
1731                                 break;
1732                         }
1733                 }
1734
1735                 // We are done referencing destructor property list
1736                 // Set this var to service properties for convenience
1737                 properties = MLT_SERVICE_PROPERTIES( service );
1738
1739                 // Assign the title
1740                 mlt_properties_set( properties, "title", title );
1741
1742                 // Optimise for overlapping producers
1743                 mlt_producer_optimise( MLT_PRODUCER( service ) );
1744
1745                 // Handle deep copies
1746                 if ( getenv( "MLT_XML_DEEP" ) == NULL )
1747                 {
1748                         // Now assign additional properties
1749                         if ( is_filename && (
1750                                 mlt_service_identify( service ) == tractor_type ||
1751                                 mlt_service_identify( service ) == playlist_type ||
1752                                 mlt_service_identify( service ) == multitrack_type ) )
1753                         {
1754                                 mlt_properties_set_int( properties, "_original_type",
1755                                         mlt_service_identify( service ) );
1756                                 mlt_properties_set( properties, "_original_resource",
1757                                         mlt_properties_get( properties, "resource" ) );
1758                                 mlt_properties_set( properties, "resource", data );
1759                         }
1760
1761                         // This tells consumer_xml not to deep copy
1762                         mlt_properties_set( properties, "xml", "was here" );
1763                 }
1764                 else
1765                 {
1766                         // Allow the project to be edited
1767                         mlt_properties_set( properties, "_xml", "was here" );
1768                         mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
1769                 }
1770
1771                 // Make consumer available
1772                 mlt_properties_inc_ref( MLT_CONSUMER_PROPERTIES( context->consumer ) );
1773                 mlt_properties_set_data( properties, "consumer", context->consumer, 0,
1774                         (mlt_destructor) mlt_consumer_close, NULL );
1775
1776                 mlt_properties_set_int( properties, "seekable", context->seekable );
1777         }
1778         else
1779         {
1780                 // Return null if not well formed
1781                 service = NULL;
1782         }
1783
1784         // Clean up
1785         mlt_properties_close( context->producer_map );
1786         if ( context->params != NULL )
1787                 mlt_properties_close( context->params );
1788         mlt_properties_close( context->destructors );
1789         if ( context->lc_numeric )
1790                 free( context->lc_numeric );
1791         free( context );
1792         free( filename );
1793
1794         return MLT_PRODUCER( service );
1795 }