46fd80965a476b1181cf397a465582e8419607af
[melted] / 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 (they are currently destroyed
22 // when the returned producer is closed).
23
24 #include "producer_westley.h"
25 #include <framework/mlt.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <stdio.h>
29 #include <ctype.h>
30 #include <unistd.h>
31
32 #include <libxml/parser.h>
33 #include <libxml/parserInternals.h> // for xmlCreateFileParserCtxt
34 #include <libxml/tree.h>
35
36 #define STACK_SIZE 1000
37 #define BRANCH_SIG_LEN 4000
38
39 #undef DEBUG
40 #ifdef DEBUG
41 extern xmlDocPtr westley_make_doc( mlt_service service );
42 #endif
43
44 enum service_type
45 {
46 mlt_invalid_type,
47 mlt_unknown_type,
48 mlt_producer_type,
49 mlt_playlist_type,
50 mlt_entry_type,
51 mlt_tractor_type,
52 mlt_multitrack_type,
53 mlt_filter_type,
54 mlt_transition_type,
55 mlt_consumer_type,
56 mlt_field_type,
57 mlt_service_type,
58 mlt_dummy_filter_type,
59 mlt_dummy_transition_type,
60 mlt_dummy_producer_type,
61 };
62
63 struct deserialise_context_s
64 {
65 enum service_type stack_types[ STACK_SIZE ];
66 mlt_service stack_service[ STACK_SIZE ];
67 int stack_service_size;
68 mlt_properties producer_map;
69 mlt_properties destructors;
70 char *property;
71 int is_value;
72 xmlDocPtr value_doc;
73 xmlNodePtr stack_node[ STACK_SIZE ];
74 int stack_node_size;
75 xmlDocPtr entity_doc;
76 int entity_is_replace;
77 int depth;
78 int branch[ STACK_SIZE ];
79 const xmlChar *publicId;
80 const xmlChar *systemId;
81 mlt_properties params;
82 };
83 typedef struct deserialise_context_s *deserialise_context;
84
85 /** Convert the numerical current branch address to a dot-delimited string.
86 */
87 static char *serialise_branch( deserialise_context this, char *s )
88 {
89 int i;
90
91 s[0] = 0;
92 for ( i = 0; i < this->depth; i++ )
93 {
94 int len = strlen( s );
95 snprintf( s + len, BRANCH_SIG_LEN - len, "%d.", this->branch[ i ] );
96 }
97 return s;
98 }
99
100 /** Push a service.
101 */
102
103 static int context_push_service( deserialise_context this, mlt_service that, enum service_type type )
104 {
105 int ret = this->stack_service_size >= STACK_SIZE - 1;
106 if ( ret == 0 )
107 {
108 this->stack_service[ this->stack_service_size ] = that;
109 this->stack_types[ this->stack_service_size++ ] = type;
110
111 // Record the tree branch on which this service lives
112 if ( that != NULL && mlt_properties_get( mlt_service_properties( that ), "_westley_branch" ) == NULL )
113 {
114 char s[ BRANCH_SIG_LEN ];
115 mlt_properties_set( mlt_service_properties( that ), "_westley_branch", serialise_branch( this, s ) );
116 }
117 }
118 return ret;
119 }
120
121 /** Pop a service.
122 */
123
124 static mlt_service context_pop_service( deserialise_context this, enum service_type *type )
125 {
126 mlt_service result = NULL;
127 if ( this->stack_service_size > 0 )
128 {
129 result = this->stack_service[ -- this->stack_service_size ];
130 if ( type != NULL )
131 *type = this->stack_types[ this->stack_service_size ];
132 }
133 return result;
134 }
135
136 /** Push a node.
137 */
138
139 static int context_push_node( deserialise_context this, xmlNodePtr node )
140 {
141 int ret = this->stack_node_size >= STACK_SIZE - 1;
142 if ( ret == 0 )
143 this->stack_node[ this->stack_node_size ++ ] = node;
144 return ret;
145 }
146
147 /** Pop a node.
148 */
149
150 static xmlNodePtr context_pop_node( deserialise_context this )
151 {
152 xmlNodePtr result = NULL;
153 if ( this->stack_node_size > 0 )
154 result = this->stack_node[ -- this->stack_node_size ];
155 return result;
156 }
157
158
159 // Set the destructor on a new service
160 static void track_service( mlt_properties properties, void *service, mlt_destructor destructor )
161 {
162 int registered = mlt_properties_get_int( properties, "registered" );
163 char *key = mlt_properties_get( properties, "registered" );
164 mlt_properties_set_data( properties, key, service, 0, destructor, NULL );
165 mlt_properties_set_int( properties, "registered", ++ registered );
166 }
167
168
169 // Prepend the property value with the document root
170 static inline void qualify_property( deserialise_context context, mlt_properties properties, char *name )
171 {
172 char *resource = mlt_properties_get( properties, name );
173 if ( resource != NULL )
174 {
175 // Qualify file name properties
176 char *root = mlt_properties_get( context->producer_map, "root" );
177 if ( root != NULL && strcmp( root, "" ) )
178 {
179 char *full_resource = malloc( strlen( root ) + strlen( resource ) + 2 );
180 if ( resource[ 0 ] != '/' && strchr( resource, ':' ) == NULL )
181 {
182 strcpy( full_resource, root );
183 strcat( full_resource, "/" );
184 strcat( full_resource, resource );
185 }
186 else
187 {
188 strcpy( full_resource, resource );
189 }
190 mlt_properties_set( properties, name, full_resource );
191 free( full_resource );
192 }
193 }
194 }
195
196
197 /** This function adds a producer to a playlist or multitrack when
198 there is no entry or track element.
199 */
200
201 static int add_producer( deserialise_context context, mlt_service service, mlt_position in, mlt_position out )
202 {
203 // Return value (0 = service remains top of stack, 1 means it can be removed)
204 int result = 0;
205
206 // Get the parent producer
207 enum service_type type;
208 mlt_service container = context_pop_service( context, &type );
209 int contained = 0;
210
211 if ( service != NULL && container != NULL )
212 {
213 char *container_branch = mlt_properties_get( mlt_service_properties( container ), "_westley_branch" );
214 char *service_branch = mlt_properties_get( mlt_service_properties( service ), "_westley_branch" );
215 contained = !strncmp( container_branch, service_branch, strlen( container_branch ) );
216 }
217
218 if ( contained )
219 {
220 mlt_properties properties = mlt_service_properties( service );
221 char *hide_s = mlt_properties_get( properties, "hide" );
222
223 // Indicate that this service is no longer top of stack
224 result = 1;
225
226 switch( type )
227 {
228 case mlt_tractor_type:
229 {
230 mlt_multitrack multitrack = mlt_tractor_multitrack( MLT_TRACTOR( container ) );
231 mlt_multitrack_connect( multitrack, MLT_PRODUCER( service ), mlt_multitrack_count( multitrack ) );
232 }
233 break;
234 case mlt_multitrack_type:
235 {
236 mlt_multitrack_connect( MLT_MULTITRACK( container ),
237 MLT_PRODUCER( service ),
238 mlt_multitrack_count( MLT_MULTITRACK( container ) ) );
239 }
240 break;
241 case mlt_playlist_type:
242 {
243 mlt_playlist_append_io( MLT_PLAYLIST( container ), MLT_PRODUCER( service ), in, out );
244 }
245 break;
246 default:
247 result = 0;
248 fprintf( stderr, "Producer defined inside something that isn't a container\n" );
249 break;
250 };
251
252 // Set the hide state of the track producer
253 if ( hide_s != NULL )
254 {
255 if ( strcmp( hide_s, "video" ) == 0 )
256 mlt_properties_set_int( properties, "hide", 1 );
257 else if ( strcmp( hide_s, "audio" ) == 0 )
258 mlt_properties_set_int( properties, "hide", 2 );
259 else if ( strcmp( hide_s, "both" ) == 0 )
260 mlt_properties_set_int( properties, "hide", 3 );
261 }
262 }
263
264 // Put the parent producer back
265 if ( container != NULL )
266 context_push_service( context, container, type );
267
268 return result;
269 }
270
271 /** Attach filters defined on that to this.
272 */
273
274 static void attach_filters( mlt_service this, mlt_service that )
275 {
276 if ( that != NULL )
277 {
278 int i = 0;
279 mlt_filter filter = NULL;
280 for ( i = 0; ( filter = mlt_service_filter( that, i ) ) != NULL; i ++ )
281 {
282 mlt_service_attach( this, filter );
283 attach_filters( mlt_filter_service( filter ), mlt_filter_service( filter ) );
284 }
285 }
286 }
287
288 static void on_start_tractor( deserialise_context context, const xmlChar *name, const xmlChar **atts)
289 {
290 mlt_service service = mlt_tractor_service( mlt_tractor_new( ) );
291 mlt_properties properties = mlt_service_properties( service );
292
293 track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
294
295 mlt_properties_set_position( properties, "length", 0 );
296
297 for ( ; atts != NULL && *atts != NULL; atts += 2 )
298 mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
299
300 if ( mlt_properties_get_position( properties, "length" ) < mlt_properties_get_position( properties, "out" ) )
301 {
302 mlt_position length = mlt_properties_get_position( properties, "out" ) + 1;
303 mlt_properties_set_position( properties, "length", length );
304 }
305
306 if ( mlt_properties_get( properties, "id" ) != NULL )
307 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
308
309 context_push_service( context, service, mlt_tractor_type );
310 }
311
312 static void on_end_tractor( deserialise_context context, const xmlChar *name )
313 {
314 // Get the tractor
315 enum service_type type;
316 mlt_service tractor = context_pop_service( context, &type );
317
318 if ( tractor != NULL && type == mlt_tractor_type )
319 {
320 // See if the tractor should be added to a playlist or multitrack
321 if ( add_producer( context, tractor, 0, mlt_producer_get_out( MLT_PRODUCER( tractor ) ) ) == 0 )
322 context_push_service( context, tractor, type );
323 }
324 }
325
326 static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
327 {
328 enum service_type type;
329 mlt_service parent = context_pop_service( context, &type );
330
331 // If we don't have a parent, then create one now, providing we're in a state where we can
332 if ( parent == NULL || ( type == mlt_playlist_type || type == mlt_multitrack_type ) )
333 {
334 // Push the parent back
335 if ( parent != NULL )
336 context_push_service( context, parent, type );
337
338 // Create a tractor to contain the multitrack
339 parent = mlt_tractor_service( mlt_tractor_new( ) );
340 track_service( context->destructors, parent, (mlt_destructor) mlt_tractor_close );
341 type = mlt_tractor_type;
342
343 // Flag it as a synthesised tractor for clean up later
344 mlt_properties_set_int( mlt_service_properties( parent ), "fezzik_synth", 1 );
345 }
346
347 if ( type == mlt_tractor_type )
348 {
349 mlt_service service = MLT_SERVICE( mlt_tractor_multitrack( MLT_TRACTOR( parent ) ) );
350 mlt_properties properties = mlt_service_properties( service );
351 mlt_properties_set_position( properties, "length", 0 );
352 for ( ; atts != NULL && *atts != NULL; atts += 2 )
353 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
354
355 if ( mlt_properties_get( properties, "id" ) != NULL )
356 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties,"id" ), service, 0, NULL, NULL );
357
358 context_push_service( context, parent, type );
359 context_push_service( context, service, mlt_multitrack_type );
360 }
361 else
362 {
363 fprintf( stderr, "Invalid multitrack position\n" );
364 }
365 }
366
367 static void on_end_multitrack( deserialise_context context, const xmlChar *name )
368 {
369 // Get the multitrack from the stack
370 enum service_type type;
371 mlt_service service = context_pop_service( context, &type );
372
373 if ( service == NULL || type != mlt_multitrack_type )
374 fprintf( stderr, "End multitrack in the wrong state...\n" );
375 }
376
377 static void on_start_playlist( deserialise_context context, const xmlChar *name, const xmlChar **atts)
378 {
379 mlt_service service = mlt_playlist_service( mlt_playlist_init() );
380 mlt_properties properties = mlt_service_properties( service );
381
382 track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
383
384 mlt_properties_set_position( properties, "length", 0 );
385
386 for ( ; atts != NULL && *atts != NULL; atts += 2 )
387 {
388 mlt_properties_set( properties, ( char* )atts[0], ( char* )atts[1] );
389
390 // Out will be overwritten later as we append, so we need to save it
391 if ( strcmp( atts[ 0 ], "out" ) == 0 )
392 mlt_properties_set( properties, "_westley.out", ( char* )atts[ 1 ] );
393 }
394
395 if ( mlt_properties_get( properties, "id" ) != NULL )
396 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
397
398 context_push_service( context, service, mlt_playlist_type );
399 }
400
401 static void on_end_playlist( deserialise_context context, const xmlChar *name )
402 {
403 // Get the playlist from the stack
404 enum service_type type;
405 mlt_service service = context_pop_service( context, &type );
406
407 if ( service != NULL && type == mlt_playlist_type )
408 {
409 mlt_properties properties = mlt_service_properties( service );
410 mlt_position in = mlt_properties_get_position( properties, "in" );
411 mlt_position out;
412
413 if ( mlt_properties_get( properties, "_westley.out" ) != NULL )
414 out = mlt_properties_get_position( properties, "_westley.out" );
415 else
416 out = mlt_properties_get_position( properties, "length" ) - 1;
417
418 if ( mlt_properties_get_position( properties, "length" ) < out )
419 mlt_properties_set_position( properties, "length", out + 1 );
420
421 mlt_producer_set_in_and_out( MLT_PRODUCER( service ), in, out );
422
423 // See if the playlist should be added to a playlist or multitrack
424 if ( add_producer( context, service, in, out ) == 0 )
425 context_push_service( context, service, type );
426 }
427 else
428 {
429 fprintf( stderr, "Invalid state of playlist end\n" );
430 }
431 }
432
433 static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
434 {
435 // use a dummy service to hold properties to allow arbitrary nesting
436 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
437 mlt_service_init( service, NULL );
438
439 mlt_properties properties = mlt_service_properties( service );
440
441 context_push_service( context, service, mlt_dummy_producer_type );
442
443 for ( ; atts != NULL && *atts != NULL; atts += 2 )
444 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
445 }
446
447 static void on_end_producer( deserialise_context context, const xmlChar *name )
448 {
449 enum service_type type;
450 mlt_service service = context_pop_service( context, &type );
451 mlt_properties properties = mlt_service_properties( service );
452
453 if ( service != NULL && type == mlt_dummy_producer_type )
454 {
455 mlt_service producer = NULL;
456
457 qualify_property( context, properties, "resource" );
458 char *resource = mlt_properties_get( properties, "resource" );
459
460 // Let Kino-SMIL src be a synonym for resource
461 if ( resource == NULL )
462 {
463 qualify_property( context, properties, "src" );
464 resource = mlt_properties_get( properties, "src" );
465 }
466
467 // Instantiate the producer
468 if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
469 {
470 char temp[ 1024 ];
471 strncpy( temp, mlt_properties_get( properties, "mlt_service" ), 1024 );
472 if ( resource != NULL )
473 {
474 strcat( temp, ":" );
475 strncat( temp, resource, 1023 - strlen( temp ) );
476 }
477 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", temp ) );
478 }
479
480 // Just in case the plugin requested doesn't exist...
481 if ( producer == NULL && resource != NULL )
482 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", resource ) );
483
484 // Track this producer
485 track_service( context->destructors, producer, (mlt_destructor) mlt_producer_close );
486
487 // Propogate the properties
488 qualify_property( context, properties, "resource" );
489 qualify_property( context, properties, "luma" );
490 qualify_property( context, properties, "luma.resource" );
491 qualify_property( context, properties, "composite.luma" );
492 qualify_property( context, properties, "producer.resource" );
493
494 // Handle in/out properties separately
495 mlt_position in = -1;
496 mlt_position out = -1;
497
498 // Get in
499 if ( mlt_properties_get( properties, "in" ) != NULL )
500 in = mlt_properties_get_position( properties, "in" );
501 // Let Kino-SMIL clipBegin be a synonym for in
502 if ( mlt_properties_get( properties, "clipBegin" ) != NULL )
503 in = mlt_properties_get_position( properties, "clipBegin" );
504 // Get out
505 if ( mlt_properties_get( properties, "out" ) != NULL )
506 out = mlt_properties_get_position( properties, "out" );
507 // Let Kino-SMIL clipEnd be a synonym for out
508 if ( mlt_properties_get( properties, "clipEnd" ) != NULL )
509 out = mlt_properties_get_position( properties, "clipEnd" );
510
511 // Remove in and out
512 mlt_properties_set( properties, "in", NULL );
513 mlt_properties_set( properties, "out", NULL );
514
515 // Inherit the properties
516 mlt_properties_inherit( mlt_service_properties( producer ), properties );
517
518 // Attach all filters from service onto producer
519 attach_filters( producer, service );
520
521 // Add the producer to the producer map
522 if ( mlt_properties_get( properties, "id" ) != NULL )
523 mlt_properties_set_data( context->producer_map, mlt_properties_get(properties, "id"), producer, 0, NULL, NULL );
524
525 // See if the producer should be added to a playlist or multitrack
526 if ( add_producer( context, producer, in, out ) == 0 )
527 {
528 // Otherwise, set in and out on...
529 if ( in != -1 || out != -1 )
530 {
531 // Get the parent service
532 enum service_type type;
533 mlt_service parent = context_pop_service( context, &type );
534 if ( parent != NULL )
535 {
536 // Get the parent properties
537 properties = mlt_service_properties( parent );
538
539 char *resource = mlt_properties_get( properties, "resource" );
540
541 // Put the parent producer back
542 context_push_service( context, parent, type );
543
544 // If the parent is a track or entry
545 if ( resource && ( strcmp( resource, "<entry>" ) == 0 ) )
546 {
547 mlt_properties_set_position( properties, "in", in );
548 mlt_properties_set_position( properties, "out", out );
549 }
550 else
551 {
552 // Otherwise, set in and out on producer directly
553 mlt_producer_set_in_and_out( MLT_PRODUCER( service ), in, out );
554 }
555 }
556 else
557 {
558 // Otherwise, set in and out on producer directly
559 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
560 }
561 }
562
563 // Push the producer onto the stack
564 context_push_service( context, producer, mlt_producer_type );
565 }
566
567 mlt_service_close( service );
568 }
569 }
570
571 static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
572 {
573 // Get the playlist from the stack
574 enum service_type type;
575 mlt_service service = context_pop_service( context, &type );
576 mlt_position length = 0;
577
578 if ( type == mlt_playlist_type && service != NULL )
579 {
580 // Look for the length attribute
581 for ( ; atts != NULL && *atts != NULL; atts += 2 )
582 {
583 if ( strcmp( atts[0], "length" ) == 0 )
584 {
585 length = atoll( atts[1] );
586 break;
587 }
588 }
589
590 // Append a blank to the playlist
591 mlt_playlist_blank( MLT_PLAYLIST( service ), length - 1 );
592
593 // Push the playlist back onto the stack
594 context_push_service( context, service, type );
595 }
596 else
597 {
598 fprintf( stderr, "blank without a playlist - a definite no no\n" );
599 }
600 }
601
602 static void on_start_entry_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
603 {
604 // use a dummy service to hold properties to allow arbitrary nesting
605 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
606 mlt_service_init( service, NULL );
607
608 // Push the dummy service onto the stack
609 context_push_service( context, service, mlt_entry_type );
610
611 if ( strcmp( name, "entry" ) == 0 )
612 mlt_properties_set( mlt_service_properties( service ), "resource", "<entry>" );
613 else
614 mlt_properties_set( mlt_service_properties( service ), "resource", "<track>" );
615
616 for ( ; atts != NULL && *atts != NULL; atts += 2 )
617 {
618 mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
619
620 // Look for the producer attribute
621 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
622 {
623 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
624 if ( producer != NULL )
625 mlt_properties_set_data( mlt_service_properties( service ), "producer", producer, 0, NULL, NULL );
626 }
627 }
628 }
629
630 static void on_end_track( deserialise_context context, const xmlChar *name )
631 {
632 // Get the track from the stack
633 enum service_type track_type;
634 mlt_service track = context_pop_service( context, &track_type );
635
636 if ( track != NULL && track_type == mlt_entry_type )
637 {
638 mlt_properties track_props = mlt_service_properties( track );
639 enum service_type parent_type;
640 mlt_service parent = context_pop_service( context, &parent_type );
641 mlt_multitrack multitrack = NULL;
642
643 mlt_producer producer = mlt_properties_get_data( track_props, "producer", NULL );
644 mlt_properties producer_props = mlt_producer_properties( producer );
645
646 if ( parent_type == mlt_tractor_type )
647 multitrack = mlt_tractor_multitrack( MLT_TRACTOR( parent ) );
648 else if ( parent_type == mlt_multitrack_type )
649 multitrack = MLT_MULTITRACK( parent );
650 else
651 fprintf( stderr, "track contained in an invalid container\n" );
652
653 if ( multitrack != NULL )
654 {
655 // Set the track on the multitrack
656 mlt_multitrack_connect( multitrack, producer, mlt_multitrack_count( multitrack ) );
657
658 // Set producer i/o if specified
659 if ( mlt_properties_get( track_props, "in" ) != NULL ||
660 mlt_properties_get( track_props, "out" ) != NULL )
661 {
662 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ),
663 mlt_properties_get_position( track_props, "in" ),
664 mlt_properties_get_position( track_props, "out" ) );
665 }
666
667 // Set the hide state of the track producer
668 char *hide_s = mlt_properties_get( track_props, "hide" );
669 if ( hide_s != NULL )
670 {
671 if ( strcmp( hide_s, "video" ) == 0 )
672 mlt_properties_set_int( producer_props, "hide", 1 );
673 else if ( strcmp( hide_s, "audio" ) == 0 )
674 mlt_properties_set_int( producer_props, "hide", 2 );
675 else if ( strcmp( hide_s, "both" ) == 0 )
676 mlt_properties_set_int( producer_props, "hide", 3 );
677 }
678 }
679
680 if ( parent != NULL )
681 context_push_service( context, parent, parent_type );
682
683 mlt_service_close( track );
684 }
685 else
686 {
687 fprintf( stderr, "Invalid state at end of track\n" );
688 }
689 }
690
691 static void on_end_entry( deserialise_context context, const xmlChar *name )
692 {
693 // Get the entry from the stack
694 enum service_type entry_type;
695 mlt_service entry = context_pop_service( context, &entry_type );
696
697 if ( entry != NULL && entry_type == mlt_entry_type )
698 {
699 mlt_properties entry_props = mlt_service_properties( entry );
700 enum service_type parent_type;
701 mlt_service parent = context_pop_service( context, &parent_type );
702 mlt_producer producer = mlt_properties_get_data( entry_props, "producer", NULL );
703
704 if ( parent_type == mlt_playlist_type )
705 {
706 // Append the producer to the playlist
707 if ( mlt_properties_get( mlt_service_properties( entry ), "in" ) != NULL ||
708 mlt_properties_get( mlt_service_properties( entry ), "out" ) != NULL )
709 {
710 mlt_playlist_append_io( MLT_PLAYLIST( parent ), producer,
711 mlt_properties_get_position( mlt_service_properties( entry ), "in" ),
712 mlt_properties_get_position( mlt_service_properties( entry ), "out" ) );
713 }
714 else
715 {
716 mlt_playlist_append( MLT_PLAYLIST( parent ), producer );
717 }
718 }
719 else
720 {
721 fprintf( stderr, "Invalid position for an entry...\n" );
722 }
723
724 if ( parent != NULL )
725 context_push_service( context, parent, parent_type );
726
727 mlt_service_close( entry );
728 }
729 else
730 {
731 fprintf( stderr, "Invalid state at end of entry\n" );
732 }
733 }
734
735 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
736 {
737 // use a dummy service to hold properties to allow arbitrary nesting
738 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
739 mlt_service_init( service, NULL );
740
741 mlt_properties properties = mlt_service_properties( service );
742
743 context_push_service( context, service, mlt_dummy_filter_type );
744
745 // Set the properties
746 for ( ; atts != NULL && *atts != NULL; atts += 2 )
747 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
748 }
749
750 static void on_end_filter( deserialise_context context, const xmlChar *name )
751 {
752 enum service_type type;
753 mlt_service service = context_pop_service( context, &type );
754 mlt_properties properties = mlt_service_properties( service );
755
756 enum service_type parent_type;
757 mlt_service parent = context_pop_service( context, &parent_type );
758
759 if ( service != NULL && type == mlt_dummy_filter_type )
760 {
761 mlt_service filter = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
762 mlt_properties filter_props = mlt_service_properties( filter );
763
764 track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
765
766 // Propogate the properties
767 qualify_property( context, properties, "resource" );
768 qualify_property( context, properties, "luma" );
769 qualify_property( context, properties, "luma.resource" );
770 qualify_property( context, properties, "composite.luma" );
771 qualify_property( context, properties, "producer.resource" );
772 mlt_properties_inherit( filter_props, properties );
773
774 // Attach all filters from service onto filter
775 attach_filters( filter, service );
776
777 // Associate the filter with the parent
778 if ( parent != NULL )
779 {
780 if ( parent_type == mlt_tractor_type )
781 {
782 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
783 mlt_field_plant_filter( field, MLT_FILTER( filter ), mlt_properties_get_int( properties, "track" ) );
784 mlt_filter_set_in_and_out( MLT_FILTER( filter ),
785 mlt_properties_get_int( properties, "in" ),
786 mlt_properties_get_int( properties, "out" ) );
787 }
788 else
789 {
790 mlt_service_attach( parent, MLT_FILTER( filter ) );
791 }
792
793 // Put the parent back on the stack
794 context_push_service( context, parent, parent_type );
795 }
796 else
797 {
798 fprintf( stderr, "filter closed with invalid parent...\n" );
799 }
800
801 // Close the dummy filter service
802 mlt_service_close( service );
803 }
804 else
805 {
806 fprintf( stderr, "Invalid top of stack on filter close\n" );
807 }
808 }
809
810 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
811 {
812 // use a dummy service to hold properties to allow arbitrary nesting
813 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
814 mlt_service_init( service, NULL );
815
816 mlt_properties properties = mlt_service_properties( service );
817
818 context_push_service( context, service, mlt_dummy_transition_type );
819
820 // Set the properties
821 for ( ; atts != NULL && *atts != NULL; atts += 2 )
822 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
823 }
824
825 static void on_end_transition( deserialise_context context, const xmlChar *name )
826 {
827 enum service_type type;
828 mlt_service service = context_pop_service( context, &type );
829 mlt_properties properties = mlt_service_properties( service );
830
831 enum service_type parent_type;
832 mlt_service parent = context_pop_service( context, &parent_type );
833
834 if ( service != NULL && type == mlt_dummy_transition_type )
835 {
836 mlt_service effect = MLT_SERVICE( mlt_factory_transition(mlt_properties_get(properties,"mlt_service"), NULL ) );
837 mlt_properties effect_props = mlt_service_properties( effect );
838
839 track_service( context->destructors, effect, (mlt_destructor) mlt_transition_close );
840
841 // Propogate the properties
842 qualify_property( context, properties, "resource" );
843 qualify_property( context, properties, "luma" );
844 qualify_property( context, properties, "luma.resource" );
845 qualify_property( context, properties, "composite.luma" );
846 qualify_property( context, properties, "producer.resource" );
847 mlt_properties_inherit( effect_props, properties );
848
849 // Attach all filters from service onto effect
850 attach_filters( effect, service );
851
852 // Associate the filter with the parent
853 if ( parent != NULL )
854 {
855 if ( parent_type == mlt_tractor_type )
856 {
857 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
858 mlt_field_plant_transition( field, MLT_TRANSITION( effect ),
859 mlt_properties_get_int( properties, "a_track" ),
860 mlt_properties_get_int( properties, "b_track" ) );
861 mlt_transition_set_in_and_out( MLT_TRANSITION( effect ),
862 mlt_properties_get_int( properties, "in" ),
863 mlt_properties_get_int( properties, "out" ) );
864 }
865 else
866 {
867 fprintf( stderr, "Misplaced transition - ignoring\n" );
868 }
869
870 // Put the parent back on the stack
871 context_push_service( context, parent, parent_type );
872 }
873 else
874 {
875 fprintf( stderr, "transition closed with invalid parent...\n" );
876 }
877
878 // Close the dummy filter service
879 mlt_service_close( service );
880 }
881 else
882 {
883 fprintf( stderr, "Invalid top of stack on transition close\n" );
884 }
885 }
886
887 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
888 {
889 enum service_type type;
890 mlt_service service = context_pop_service( context, &type );
891 mlt_properties properties = mlt_service_properties( service );
892 char *value = NULL;
893
894 if ( service != NULL )
895 {
896 // Set the properties
897 for ( ; atts != NULL && *atts != NULL; atts += 2 )
898 {
899 if ( strcmp( atts[ 0 ], "name" ) == 0 )
900 context->property = strdup( atts[ 1 ] );
901 else if ( strcmp( atts[ 0 ], "value" ) == 0 )
902 value = (char*) atts[ 1 ];
903 }
904
905 if ( context->property != NULL && value != NULL )
906 mlt_properties_set( properties, context->property, value );
907
908 // Tell parser to collect any further nodes for serialisation
909 context->is_value = 1;
910
911 context_push_service( context, service, type );
912 }
913 else
914 {
915 fprintf( stderr, "Property without a service '%s'?\n", ( char * )name );
916 }
917 }
918
919 static void on_end_property( deserialise_context context, const xmlChar *name )
920 {
921 enum service_type type;
922 mlt_service service = context_pop_service( context, &type );
923 mlt_properties properties = mlt_service_properties( service );
924
925 if ( service != NULL )
926 {
927 // Tell parser to stop building a tree
928 context->is_value = 0;
929
930 // See if there is a xml tree for the value
931 if ( context->property != NULL && context->value_doc != NULL )
932 {
933 xmlChar *value;
934 int size;
935
936 // Serialise the tree to get value
937 xmlDocDumpMemory( context->value_doc, &value, &size );
938 mlt_properties_set( properties, context->property, value );
939 xmlFree( value );
940 xmlFreeDoc( context->value_doc );
941 context->value_doc = NULL;
942 }
943
944 // Close this property handling
945 free( context->property );
946 context->property = NULL;
947
948 context_push_service( context, service, type );
949 }
950 else
951 {
952 fprintf( stderr, "Property without a service '%s'??\n", (char *)name );
953 }
954 }
955
956 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
957 {
958 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
959 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
960
961 //printf("on_start_element: %s\n", name );
962 context->branch[ context->depth ] ++;
963 context->depth ++;
964
965 // Build a tree from nodes within a property value
966 if ( context->is_value == 1 )
967 {
968 xmlNodePtr node = xmlNewNode( NULL, name );
969
970 if ( context->value_doc == NULL )
971 {
972 // Start a new tree
973 context->value_doc = xmlNewDoc( "1.0" );
974 xmlDocSetRootElement( context->value_doc, node );
975 }
976 else
977 {
978 // Append child to tree
979 xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node );
980 }
981 context_push_node( context, node );
982
983 // Set the attributes
984 for ( ; atts != NULL && *atts != NULL; atts += 2 )
985 xmlSetProp( node, atts[ 0 ], atts[ 1 ] );
986 }
987 else if ( strcmp( name, "tractor" ) == 0 )
988 on_start_tractor( context, name, atts );
989 else if ( strcmp( name, "multitrack" ) == 0 )
990 on_start_multitrack( context, name, atts );
991 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
992 on_start_playlist( context, name, atts );
993 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
994 on_start_producer( context, name, atts );
995 else if ( strcmp( name, "blank" ) == 0 )
996 on_start_blank( context, name, atts );
997 else if ( strcmp( name, "entry" ) == 0 || strcmp( name, "track" ) == 0 )
998 on_start_entry_track( context, name, atts );
999 else if ( strcmp( name, "filter" ) == 0 )
1000 on_start_filter( context, name, atts );
1001 else if ( strcmp( name, "transition" ) == 0 )
1002 on_start_transition( context, name, atts );
1003 else if ( strcmp( name, "property" ) == 0 )
1004 on_start_property( context, name, atts );
1005 else if ( strcmp( name, "westley" ) == 0 )
1006 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1007 mlt_properties_set( context->producer_map, ( char * )atts[ 0 ], ( char * )atts[ 1 ] );
1008 }
1009
1010 static void on_end_element( void *ctx, const xmlChar *name )
1011 {
1012 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1013 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1014
1015 //printf("on_end_element: %s\n", name );
1016 if ( context->is_value == 1 && strcmp( name, "property" ) != 0 )
1017 context_pop_node( context );
1018 else if ( strcmp( name, "multitrack" ) == 0 )
1019 on_end_multitrack( context, name );
1020 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1021 on_end_playlist( context, name );
1022 else if ( strcmp( name, "track" ) == 0 )
1023 on_end_track( context, name );
1024 else if ( strcmp( name, "entry" ) == 0 )
1025 on_end_entry( context, name );
1026 else if ( strcmp( name, "tractor" ) == 0 )
1027 on_end_tractor( context, name );
1028 else if ( strcmp( name, "property" ) == 0 )
1029 on_end_property( context, name );
1030 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1031 on_end_producer( context, name );
1032 else if ( strcmp( name, "filter" ) == 0 )
1033 on_end_filter( context, name );
1034 else if ( strcmp( name, "transition" ) == 0 )
1035 on_end_transition( context, name );
1036
1037 context->branch[ context->depth ] = 0;
1038 context->depth --;
1039 }
1040
1041 static void on_characters( void *ctx, const xmlChar *ch, int len )
1042 {
1043 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1044 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1045 char *value = calloc( len + 1, 1 );
1046 enum service_type type;
1047 mlt_service service = context_pop_service( context, &type );
1048 mlt_properties properties = mlt_service_properties( service );
1049
1050 if ( service != NULL )
1051 context_push_service( context, service, type );
1052
1053 value[ len ] = 0;
1054 strncpy( value, (const char*) ch, len );
1055
1056 if ( context->stack_node_size > 0 )
1057 xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value );
1058
1059 // libxml2 generates an on_characters immediately after a get_entity within
1060 // an element value, and we ignore it because it is called again during
1061 // actual substitution.
1062 else if ( context->property != NULL && context->entity_is_replace == 0 )
1063 {
1064 char *s = mlt_properties_get( properties, context->property );
1065 if ( s != NULL )
1066 {
1067 // Append new text to existing content
1068 char *new = calloc( strlen( s ) + len + 1, 1 );
1069 strcat( new, s );
1070 strcat( new, value );
1071 mlt_properties_set( properties, context->property, new );
1072 free( new );
1073 }
1074 else
1075 mlt_properties_set( properties, context->property, value );
1076 }
1077 context->entity_is_replace = 0;
1078
1079 free( value);
1080 }
1081
1082 /** Convert parameters parsed from resource into entity declarations.
1083 */
1084 static void params_to_entities( deserialise_context context )
1085 {
1086 if ( context->params != NULL )
1087 {
1088 int i;
1089
1090 // Add our params as entitiy declarations
1091 for ( i = 0; i < mlt_properties_count( context->params ); i++ )
1092 {
1093 xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i );
1094 xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY,
1095 context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, name ) );
1096 }
1097
1098 // Flag completion
1099 mlt_properties_close( context->params );
1100 context->params = NULL;
1101 }
1102 }
1103
1104 // The following 3 facilitate entity substitution in the SAX parser
1105 static void on_internal_subset( void *ctx, const xmlChar* name,
1106 const xmlChar* publicId, const xmlChar* systemId )
1107 {
1108 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1109 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1110
1111 context->publicId = publicId;
1112 context->systemId = systemId;
1113 xmlCreateIntSubset( context->entity_doc, name, publicId, systemId );
1114
1115 // Override default entities with our parameters
1116 params_to_entities( context );
1117 }
1118
1119 static void on_entity_declaration( void *ctx, const xmlChar* name, int type,
1120 const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
1121 {
1122 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1123 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1124
1125 xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content );
1126 }
1127
1128 xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name )
1129 {
1130 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1131 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1132 xmlEntityPtr e = NULL;
1133
1134 // Setup for entity declarations if not ready
1135 if ( xmlGetIntSubset( context->entity_doc ) == NULL )
1136 {
1137 xmlCreateIntSubset( context->entity_doc, "westley", "", "" );
1138 context->publicId = "";
1139 context->systemId = "";
1140 }
1141
1142 // Add our parameters if not already
1143 params_to_entities( context );
1144
1145 e = xmlGetDocEntity( context->entity_doc, name );
1146
1147 // Send signal to on_characters that an entity substitutin is pending
1148 if ( e != NULL )
1149 context->entity_is_replace = 1;
1150
1151 return e;
1152 }
1153
1154 /** Convert a hexadecimal character to its value.
1155 */
1156 static int tohex( char p )
1157 {
1158 return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10;
1159 }
1160
1161 /** Decode a url-encoded string containing hexadecimal character sequences.
1162 */
1163 static char *url_decode( char *dest, char *src )
1164 {
1165 char *p = dest;
1166
1167 while ( *src )
1168 {
1169 if ( *src == '%' )
1170 {
1171 *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) );
1172 src += 3;
1173 }
1174 else
1175 {
1176 *p ++ = *src ++;
1177 }
1178 }
1179
1180 *p = *src;
1181 return dest;
1182 }
1183
1184 /** Extract the filename from a URL attaching parameters to a properties list.
1185 */
1186 static void parse_url( mlt_properties properties, char *url )
1187 {
1188 int i;
1189 int n = strlen( url );
1190 char *name = NULL;
1191 char *value = NULL;
1192
1193 for ( i = 0; i < n; i++ )
1194 {
1195 switch ( url[ i ] )
1196 {
1197 case '?':
1198 url[ i++ ] = '\0';
1199 name = &url[ i ];
1200 break;
1201
1202 case ':':
1203 case '=':
1204 url[ i++ ] = '\0';
1205 value = &url[ i ];
1206 break;
1207
1208 case '&':
1209 url[ i++ ] = '\0';
1210 if ( name != NULL && value != NULL )
1211 mlt_properties_set( properties, name, value );
1212 name = &url[ i ];
1213 value = NULL;
1214 break;
1215 }
1216 }
1217 if ( name != NULL && value != NULL )
1218 mlt_properties_set( properties, name, value );
1219 }
1220
1221 mlt_producer producer_westley_init( int info, char *data )
1222 {
1223 if ( data == NULL )
1224 return NULL;
1225 xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
1226 struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
1227 mlt_properties properties = NULL;
1228 int i = 0;
1229 struct _xmlParserCtxt *xmlcontext;
1230 int well_formed = 0;
1231 char *filename = NULL;
1232
1233 context->producer_map = mlt_properties_new();
1234 context->destructors = mlt_properties_new();
1235 context->params = mlt_properties_new();
1236
1237 // Decode URL and parse parameters
1238 mlt_properties_set( context->producer_map, "root", "" );
1239 if ( info == 0 )
1240 {
1241 filename = strdup( data );
1242 parse_url( context->params, url_decode( filename, data ) );
1243
1244 // We need the directory prefix which was used for the westley
1245 if ( strchr( filename, '/' ) )
1246 {
1247 char *root = NULL;
1248 mlt_properties_set( context->producer_map, "root", filename );
1249 root = mlt_properties_get( context->producer_map, "root" );
1250 *( strrchr( root, '/' ) ) = '\0';
1251
1252 // If we don't have an absolute path here, we're heading for disaster...
1253 if ( root[ 0 ] != '/' )
1254 {
1255 char *cwd = getcwd( NULL, 0 );
1256 char *real = malloc( strlen( cwd ) + strlen( root ) + 2 );
1257 sprintf( real, "%s/%s", cwd, root );
1258 mlt_properties_set( context->producer_map, "root", real );
1259 free( real );
1260 free( cwd );
1261 }
1262 }
1263 }
1264
1265 // We need to track the number of registered filters
1266 mlt_properties_set_int( context->destructors, "registered", 0 );
1267
1268 // Setup SAX callbacks
1269 sax->startElement = on_start_element;
1270 sax->endElement = on_end_element;
1271 sax->characters = on_characters;
1272 sax->cdataBlock = on_characters;
1273 sax->internalSubset = on_internal_subset;
1274 sax->entityDecl = on_entity_declaration;
1275 sax->getEntity = on_get_entity;
1276
1277 // Setup libxml2 SAX parsing
1278 xmlInitParser();
1279 xmlSubstituteEntitiesDefault( 1 );
1280 // This is used to facilitate entity substitution in the SAX parser
1281 context->entity_doc = xmlNewDoc( "1.0" );
1282 if ( info == 0 )
1283 xmlcontext = xmlCreateFileParserCtxt( filename );
1284 else
1285 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1286
1287 xmlcontext->sax = sax;
1288 xmlcontext->_private = ( void* )context;
1289
1290 // Parse
1291 xmlParseDocument( xmlcontext );
1292 well_formed = xmlcontext->wellFormed;
1293
1294 // Cleanup after parsing
1295 xmlFreeDoc( context->entity_doc );
1296 free( sax );
1297 xmlcontext->sax = NULL;
1298 xmlcontext->_private = NULL;
1299 xmlFreeParserCtxt( xmlcontext );
1300 xmlMemoryDump( ); // for debugging
1301
1302 // Get the last producer on the stack
1303 enum service_type type;
1304 mlt_service service = context_pop_service( context, &type );
1305 if ( well_formed && service != NULL )
1306 {
1307 // Verify it is a producer service (mlt_type="mlt_producer")
1308 // (producer, playlist, multitrack)
1309 char *type = mlt_properties_get( mlt_service_properties( service ), "mlt_type" );
1310 if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 && strcmp( type, "producer" ) != 0 ) )
1311 service = NULL;
1312 }
1313
1314 #ifdef DEBUG
1315 xmlDocPtr doc = westley_make_doc( service );
1316 xmlDocFormatDump( stdout, doc, 1 );
1317 xmlFreeDoc( doc );
1318 service = NULL;
1319 #endif
1320
1321 if ( well_formed && service != NULL )
1322 {
1323 char *title = mlt_properties_get( context->producer_map, "title" );
1324
1325 // Need the complete producer list for various reasons
1326 properties = context->destructors;
1327
1328 // Now make sure we don't have a reference to the service in the properties
1329 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
1330 {
1331 char *name = mlt_properties_get_name( properties, i );
1332 if ( mlt_properties_get_data( properties, name, NULL ) == service )
1333 {
1334 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
1335 break;
1336 }
1337 }
1338
1339 // We are done referencing destructor property list
1340 // Set this var to service properties for convenience
1341 properties = mlt_service_properties( service );
1342
1343 // make the returned service destroy the connected services
1344 mlt_properties_set_data( properties, "__destructors__", context->destructors, 0, (mlt_destructor) mlt_properties_close, NULL );
1345
1346 // Assign the title
1347 mlt_properties_set( properties, "title", title );
1348
1349 // Handle deep copies
1350 if ( getenv( "MLT_WESTLEY_DEEP" ) == NULL )
1351 {
1352 // Now assign additional properties
1353 if ( info == 0 )
1354 mlt_properties_set( properties, "resource", data );
1355
1356 // This tells consumer_westley not to deep copy
1357 mlt_properties_set( properties, "westley", "was here" );
1358 }
1359 else
1360 {
1361 // Allow the project to be edited
1362 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
1363 }
1364 }
1365 else
1366 {
1367 // Return null if not well formed
1368 service = NULL;
1369
1370 // Clean up
1371 mlt_properties_close( context->destructors );
1372 }
1373
1374 // Clean up
1375 mlt_properties_close( context->producer_map );
1376 if ( context->params != NULL )
1377 mlt_properties_close( context->params );
1378 free( context );
1379 free( filename );
1380
1381 return MLT_PRODUCER( service );
1382 }