276eecf6e22316e613c710ea760411839047d113
[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_services_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_tractor tractor = mlt_tractor_new( );
291 mlt_service service = MLT_TRACTOR_SERVICE( tractor );
292 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
293
294 track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
295
296 for ( ; atts != NULL && *atts != NULL; atts += 2 )
297 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (char*) atts[0], (char*) atts[1] );
298
299 if ( mlt_properties_get( properties, "id" ) != NULL )
300 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
301
302 context_push_service( context, service, mlt_tractor_type );
303 }
304
305 static void on_end_tractor( deserialise_context context, const xmlChar *name )
306 {
307 // Get the tractor
308 enum service_type type;
309 mlt_service tractor = context_pop_service( context, &type );
310
311 if ( tractor != NULL && type == mlt_tractor_type )
312 {
313 // See if the tractor should be added to a playlist or multitrack
314 if ( add_producer( context, tractor, 0, mlt_producer_get_out( MLT_PRODUCER( tractor ) ) ) == 0 )
315 context_push_service( context, tractor, type );
316 }
317 else
318 {
319 fprintf( stderr, "Invalid state for tractor\n" );
320 }
321 }
322
323 static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
324 {
325 enum service_type type;
326 mlt_service parent = context_pop_service( context, &type );
327
328 // If we don't have a parent, then create one now, providing we're in a state where we can
329 if ( parent == NULL || ( type == mlt_playlist_type || type == mlt_multitrack_type ) )
330 {
331 mlt_tractor tractor = NULL;
332 // Push the parent back
333 if ( parent != NULL )
334 context_push_service( context, parent, type );
335
336 // Create a tractor to contain the multitrack
337 tractor = mlt_tractor_new( );
338 parent = MLT_TRACTOR_SERVICE( tractor );
339 track_service( context->destructors, parent, (mlt_destructor) mlt_tractor_close );
340 type = mlt_tractor_type;
341
342 // Flag it as a synthesised tractor for clean up later
343 mlt_properties_set_int( MLT_SERVICE_PROPERTIES( parent ), "fezzik_synth", 1 );
344 }
345
346 if ( type == mlt_tractor_type )
347 {
348 mlt_service service = MLT_SERVICE( mlt_tractor_multitrack( MLT_TRACTOR( parent ) ) );
349 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
350 for ( ; atts != NULL && *atts != NULL; atts += 2 )
351 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
352
353 if ( mlt_properties_get( properties, "id" ) != NULL )
354 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties,"id" ), service, 0, NULL, NULL );
355
356 context_push_service( context, parent, type );
357 context_push_service( context, service, mlt_multitrack_type );
358 }
359 else
360 {
361 fprintf( stderr, "Invalid multitrack position\n" );
362 }
363 }
364
365 static void on_end_multitrack( deserialise_context context, const xmlChar *name )
366 {
367 // Get the multitrack from the stack
368 enum service_type type;
369 mlt_service service = context_pop_service( context, &type );
370
371 if ( service == NULL || type != mlt_multitrack_type )
372 fprintf( stderr, "End multitrack in the wrong state...\n" );
373 }
374
375 static void on_start_playlist( deserialise_context context, const xmlChar *name, const xmlChar **atts)
376 {
377 mlt_playlist playlist = mlt_playlist_init( );
378 mlt_service service = MLT_PLAYLIST_SERVICE( playlist );
379 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
380
381 track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
382
383 for ( ; atts != NULL && *atts != NULL; atts += 2 )
384 {
385 mlt_properties_set( properties, ( char* )atts[0], ( char* )atts[1] );
386
387 // Out will be overwritten later as we append, so we need to save it
388 if ( strcmp( atts[ 0 ], "out" ) == 0 )
389 mlt_properties_set( properties, "_westley.out", ( char* )atts[ 1 ] );
390 }
391
392 if ( mlt_properties_get( properties, "id" ) != NULL )
393 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
394
395 context_push_service( context, service, mlt_playlist_type );
396 }
397
398 static void on_end_playlist( deserialise_context context, const xmlChar *name )
399 {
400 // Get the playlist from the stack
401 enum service_type type;
402 mlt_service service = context_pop_service( context, &type );
403
404 if ( service != NULL && type == mlt_playlist_type )
405 {
406 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
407 mlt_position in = mlt_properties_get_position( properties, "in" );
408 mlt_position out = mlt_properties_get_position( properties, "out" );
409
410 // See if the playlist should be added to a playlist or multitrack
411 if ( add_producer( context, service, in, out ) == 0 )
412 context_push_service( context, service, type );
413 }
414 else
415 {
416 fprintf( stderr, "Invalid state of playlist end\n" );
417 }
418 }
419
420 static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
421 {
422 // use a dummy service to hold properties to allow arbitrary nesting
423 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
424 mlt_service_init( service, NULL );
425
426 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
427
428 context_push_service( context, service, mlt_dummy_producer_type );
429
430 for ( ; atts != NULL && *atts != NULL; atts += 2 )
431 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
432 }
433
434 static void on_end_producer( deserialise_context context, const xmlChar *name )
435 {
436 enum service_type type;
437 mlt_service service = context_pop_service( context, &type );
438 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
439
440 if ( service != NULL && type == mlt_dummy_producer_type )
441 {
442 mlt_service producer = NULL;
443
444 qualify_property( context, properties, "resource" );
445 char *resource = mlt_properties_get( properties, "resource" );
446
447 // Let Kino-SMIL src be a synonym for resource
448 if ( resource == NULL )
449 {
450 qualify_property( context, properties, "src" );
451 resource = mlt_properties_get( properties, "src" );
452 }
453
454 // Instantiate the producer
455 if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
456 {
457 char temp[ 1024 ];
458 strncpy( temp, mlt_properties_get( properties, "mlt_service" ), 1024 );
459 if ( resource != NULL )
460 {
461 strcat( temp, ":" );
462 strncat( temp, resource, 1023 - strlen( temp ) );
463 }
464 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", temp ) );
465 }
466
467 // Just in case the plugin requested doesn't exist...
468 if ( producer == NULL && resource != NULL )
469 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", resource ) );
470
471 if ( producer == NULL )
472 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", "+INVALID.txt" ) );
473
474 // Track this producer
475 track_service( context->destructors, producer, (mlt_destructor) mlt_producer_close );
476
477 // Propogate the properties
478 qualify_property( context, properties, "resource" );
479 qualify_property( context, properties, "luma" );
480 qualify_property( context, properties, "luma.resource" );
481 qualify_property( context, properties, "composite.luma" );
482 qualify_property( context, properties, "producer.resource" );
483
484 // Handle in/out properties separately
485 mlt_position in = -1;
486 mlt_position out = -1;
487
488 // Get in
489 if ( mlt_properties_get( properties, "in" ) != NULL )
490 in = mlt_properties_get_position( properties, "in" );
491 // Let Kino-SMIL clipBegin be a synonym for in
492 if ( mlt_properties_get( properties, "clipBegin" ) != NULL )
493 in = mlt_properties_get_position( properties, "clipBegin" );
494 // Get out
495 if ( mlt_properties_get( properties, "out" ) != NULL )
496 out = mlt_properties_get_position( properties, "out" );
497 // Let Kino-SMIL clipEnd be a synonym for out
498 if ( mlt_properties_get( properties, "clipEnd" ) != NULL )
499 out = mlt_properties_get_position( properties, "clipEnd" );
500
501 // Remove in and out
502 mlt_properties_set( properties, "in", NULL );
503 mlt_properties_set( properties, "out", NULL );
504
505 // Inherit the properties
506 mlt_properties_inherit( MLT_SERVICE_PROPERTIES( producer ), properties );
507
508 // Attach all filters from service onto producer
509 attach_filters( producer, service );
510
511 // Add the producer to the producer map
512 if ( mlt_properties_get( properties, "id" ) != NULL )
513 mlt_properties_set_data( context->producer_map, mlt_properties_get(properties, "id"), producer, 0, NULL, NULL );
514
515 // See if the producer should be added to a playlist or multitrack
516 if ( add_producer( context, producer, in, out ) == 0 )
517 {
518 // Otherwise, set in and out on...
519 if ( in != -1 || out != -1 )
520 {
521 // Get the parent service
522 enum service_type type;
523 mlt_service parent = context_pop_service( context, &type );
524 if ( parent != NULL )
525 {
526 // Get the parent properties
527 properties = MLT_SERVICE_PROPERTIES( parent );
528
529 char *resource = mlt_properties_get( properties, "resource" );
530
531 // Put the parent producer back
532 context_push_service( context, parent, type );
533
534 // If the parent is a track or entry
535 if ( resource && ( strcmp( resource, "<entry>" ) == 0 ) )
536 {
537 mlt_properties_set_position( properties, "in", in );
538 mlt_properties_set_position( properties, "out", out );
539 }
540 else
541 {
542 // Otherwise, set in and out on producer directly
543 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
544 }
545 }
546 else
547 {
548 // Otherwise, set in and out on producer directly
549 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
550 }
551 }
552
553 // Push the producer onto the stack
554 context_push_service( context, producer, mlt_producer_type );
555 }
556
557 mlt_service_close( service );
558 }
559 }
560
561 static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
562 {
563 // Get the playlist from the stack
564 enum service_type type;
565 mlt_service service = context_pop_service( context, &type );
566 mlt_position length = 0;
567
568 if ( type == mlt_playlist_type && service != NULL )
569 {
570 // Look for the length attribute
571 for ( ; atts != NULL && *atts != NULL; atts += 2 )
572 {
573 if ( strcmp( atts[0], "length" ) == 0 )
574 {
575 length = atoll( atts[1] );
576 break;
577 }
578 }
579
580 // Append a blank to the playlist
581 mlt_playlist_blank( MLT_PLAYLIST( service ), length - 1 );
582
583 // Push the playlist back onto the stack
584 context_push_service( context, service, type );
585 }
586 else
587 {
588 fprintf( stderr, "blank without a playlist - a definite no no\n" );
589 }
590 }
591
592 static void on_start_entry( deserialise_context context, const xmlChar *name, const xmlChar **atts)
593 {
594 mlt_producer entry = NULL;
595 mlt_properties temp = mlt_properties_new( );
596
597 for ( ; atts != NULL && *atts != NULL; atts += 2 )
598 {
599 mlt_properties_set( temp, (char*) atts[0], (char*) atts[1] );
600
601 // Look for the producer attribute
602 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
603 {
604 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
605 if ( producer != NULL )
606 mlt_properties_set_data( temp, "producer", producer, 0, NULL, NULL );
607 }
608 }
609
610 // If we have a valid entry
611 if ( mlt_properties_get_data( temp, "producer", NULL ) != NULL )
612 {
613 mlt_playlist_clip_info info;
614 enum service_type parent_type;
615 mlt_service parent = context_pop_service( context, &parent_type );
616 mlt_producer producer = mlt_properties_get_data( temp, "producer", NULL );
617
618 if ( parent_type == mlt_playlist_type )
619 {
620 // Append the producer to the playlist
621 if ( mlt_properties_get( temp, "in" ) != NULL || mlt_properties_get( temp, "out" ) != NULL )
622 {
623 mlt_playlist_append_io( MLT_PLAYLIST( parent ), producer,
624 mlt_properties_get_position( temp, "in" ),
625 mlt_properties_get_position( temp, "out" ) );
626 }
627 else
628 {
629 mlt_playlist_append( MLT_PLAYLIST( parent ), producer );
630 }
631
632 // Handle the repeat property
633 if ( mlt_properties_get_int( temp, "repeat" ) > 0 )
634 {
635 mlt_playlist_repeat_clip( MLT_PLAYLIST( parent ),
636 mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1,
637 mlt_properties_get_int( temp, "repeat" ) );
638 }
639
640 mlt_playlist_get_clip_info( MLT_PLAYLIST( parent ), &info, mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1 );
641 entry = info.cut;
642 }
643 else
644 {
645 fprintf( stderr, "Entry not part of a playlist...\n" );
646 }
647
648 context_push_service( context, parent, parent_type );
649 }
650
651 // Push the cut onto the stack
652 context_push_service( context, MLT_PRODUCER_SERVICE( entry ), mlt_entry_type );
653
654 mlt_properties_close( temp );
655 }
656
657 static void on_end_entry( deserialise_context context, const xmlChar *name )
658 {
659 // Get the entry from the stack
660 enum service_type entry_type;
661 mlt_service entry = context_pop_service( context, &entry_type );
662
663 if ( entry == NULL && entry_type != mlt_entry_type )
664 {
665 fprintf( stderr, "Invalid state at end of entry\n" );
666 }
667 }
668
669 static void on_start_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
670 {
671 // use a dummy service to hold properties to allow arbitrary nesting
672 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
673 mlt_service_init( service, NULL );
674
675 // Push the dummy service onto the stack
676 context_push_service( context, service, mlt_entry_type );
677
678 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "resource", "<track>" );
679
680 for ( ; atts != NULL && *atts != NULL; atts += 2 )
681 {
682 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (char*) atts[0], (char*) atts[1] );
683
684 // Look for the producer attribute
685 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
686 {
687 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
688 if ( producer != NULL )
689 mlt_properties_set_data( MLT_SERVICE_PROPERTIES( service ), "producer", producer, 0, NULL, NULL );
690 }
691 }
692 }
693
694 static void on_end_track( deserialise_context context, const xmlChar *name )
695 {
696 // Get the track from the stack
697 enum service_type track_type;
698 mlt_service track = context_pop_service( context, &track_type );
699
700 if ( track != NULL && track_type == mlt_entry_type )
701 {
702 mlt_properties track_props = MLT_SERVICE_PROPERTIES( track );
703 enum service_type parent_type;
704 mlt_service parent = context_pop_service( context, &parent_type );
705 mlt_multitrack multitrack = NULL;
706
707 mlt_producer producer = mlt_properties_get_data( track_props, "producer", NULL );
708 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
709
710 if ( parent_type == mlt_tractor_type )
711 multitrack = mlt_tractor_multitrack( MLT_TRACTOR( parent ) );
712 else if ( parent_type == mlt_multitrack_type )
713 multitrack = MLT_MULTITRACK( parent );
714 else
715 fprintf( stderr, "track contained in an invalid container\n" );
716
717 if ( multitrack != NULL )
718 {
719 // Set producer i/o if specified
720 if ( mlt_properties_get( track_props, "in" ) != NULL ||
721 mlt_properties_get( track_props, "out" ) != NULL )
722 {
723 mlt_producer cut = mlt_producer_cut( MLT_PRODUCER( producer ),
724 mlt_properties_get_position( track_props, "in" ),
725 mlt_properties_get_position( track_props, "out" ) );
726 mlt_multitrack_connect( multitrack, cut, mlt_multitrack_count( multitrack ) );
727 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( cut ), track_props );
728 track_props = MLT_PRODUCER_PROPERTIES( cut );
729 mlt_producer_close( cut );
730 }
731 else
732 {
733 mlt_multitrack_connect( multitrack, producer, mlt_multitrack_count( multitrack ) );
734 }
735
736 // Set the hide state of the track producer
737 char *hide_s = mlt_properties_get( track_props, "hide" );
738 if ( hide_s != NULL )
739 {
740 if ( strcmp( hide_s, "video" ) == 0 )
741 mlt_properties_set_int( producer_props, "hide", 1 );
742 else if ( strcmp( hide_s, "audio" ) == 0 )
743 mlt_properties_set_int( producer_props, "hide", 2 );
744 else if ( strcmp( hide_s, "both" ) == 0 )
745 mlt_properties_set_int( producer_props, "hide", 3 );
746 }
747 }
748
749 if ( parent != NULL )
750 context_push_service( context, parent, parent_type );
751
752 mlt_service_close( track );
753 }
754 else
755 {
756 fprintf( stderr, "Invalid state at end of track\n" );
757 }
758 }
759
760 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
761 {
762 // use a dummy service to hold properties to allow arbitrary nesting
763 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
764 mlt_service_init( service, NULL );
765
766 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
767
768 context_push_service( context, service, mlt_dummy_filter_type );
769
770 // Set the properties
771 for ( ; atts != NULL && *atts != NULL; atts += 2 )
772 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
773 }
774
775 static void on_end_filter( deserialise_context context, const xmlChar *name )
776 {
777 enum service_type type;
778 mlt_service service = context_pop_service( context, &type );
779 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
780
781 enum service_type parent_type;
782 mlt_service parent = context_pop_service( context, &parent_type );
783
784 if ( service != NULL && type == mlt_dummy_filter_type )
785 {
786 mlt_service filter = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
787 mlt_properties filter_props = MLT_SERVICE_PROPERTIES( filter );
788
789 track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
790
791 // Propogate the properties
792 qualify_property( context, properties, "resource" );
793 qualify_property( context, properties, "luma" );
794 qualify_property( context, properties, "luma.resource" );
795 qualify_property( context, properties, "composite.luma" );
796 qualify_property( context, properties, "producer.resource" );
797 mlt_properties_inherit( filter_props, properties );
798
799 // Attach all filters from service onto filter
800 attach_filters( filter, service );
801
802 // Associate the filter with the parent
803 if ( parent != NULL )
804 {
805 if ( parent_type == mlt_tractor_type )
806 {
807 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
808 mlt_field_plant_filter( field, MLT_FILTER( filter ), mlt_properties_get_int( properties, "track" ) );
809 mlt_filter_set_in_and_out( MLT_FILTER( filter ),
810 mlt_properties_get_int( properties, "in" ),
811 mlt_properties_get_int( properties, "out" ) );
812 }
813 else
814 {
815 mlt_service_attach( parent, MLT_FILTER( filter ) );
816 }
817
818 // Put the parent back on the stack
819 context_push_service( context, parent, parent_type );
820 }
821 else
822 {
823 fprintf( stderr, "filter closed with invalid parent...\n" );
824 }
825
826 // Close the dummy filter service
827 mlt_service_close( service );
828 }
829 else
830 {
831 fprintf( stderr, "Invalid top of stack on filter close\n" );
832 }
833 }
834
835 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
836 {
837 // use a dummy service to hold properties to allow arbitrary nesting
838 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
839 mlt_service_init( service, NULL );
840
841 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
842
843 context_push_service( context, service, mlt_dummy_transition_type );
844
845 // Set the properties
846 for ( ; atts != NULL && *atts != NULL; atts += 2 )
847 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
848 }
849
850 static void on_end_transition( deserialise_context context, const xmlChar *name )
851 {
852 enum service_type type;
853 mlt_service service = context_pop_service( context, &type );
854 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
855
856 enum service_type parent_type;
857 mlt_service parent = context_pop_service( context, &parent_type );
858
859 if ( service != NULL && type == mlt_dummy_transition_type )
860 {
861 mlt_service effect = MLT_SERVICE( mlt_factory_transition(mlt_properties_get(properties,"mlt_service"), NULL ) );
862 mlt_properties effect_props = MLT_SERVICE_PROPERTIES( effect );
863
864 track_service( context->destructors, effect, (mlt_destructor) mlt_transition_close );
865
866 // Propogate the properties
867 qualify_property( context, properties, "resource" );
868 qualify_property( context, properties, "luma" );
869 qualify_property( context, properties, "luma.resource" );
870 qualify_property( context, properties, "composite.luma" );
871 qualify_property( context, properties, "producer.resource" );
872 mlt_properties_inherit( effect_props, properties );
873
874 // Attach all filters from service onto effect
875 attach_filters( effect, service );
876
877 // Associate the filter with the parent
878 if ( parent != NULL )
879 {
880 if ( parent_type == mlt_tractor_type )
881 {
882 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
883 if ( mlt_properties_get_int( properties, "a_track" ) == mlt_properties_get_int( properties, "b_track" ) )
884 mlt_properties_set_int( properties, "b_track", mlt_properties_get_int( properties, "a_track" ) + 1 );
885 mlt_field_plant_transition( field, MLT_TRANSITION( effect ),
886 mlt_properties_get_int( properties, "a_track" ),
887 mlt_properties_get_int( properties, "b_track" ) );
888 mlt_transition_set_in_and_out( MLT_TRANSITION( effect ),
889 mlt_properties_get_int( properties, "in" ),
890 mlt_properties_get_int( properties, "out" ) );
891 }
892 else
893 {
894 fprintf( stderr, "Misplaced transition - ignoring\n" );
895 }
896
897 // Put the parent back on the stack
898 context_push_service( context, parent, parent_type );
899 }
900 else
901 {
902 fprintf( stderr, "transition closed with invalid parent...\n" );
903 }
904
905 // Close the dummy filter service
906 mlt_service_close( service );
907 }
908 else
909 {
910 fprintf( stderr, "Invalid top of stack on transition close\n" );
911 }
912 }
913
914 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
915 {
916 enum service_type type;
917 mlt_service service = context_pop_service( context, &type );
918 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
919 char *value = NULL;
920
921 if ( service != NULL )
922 {
923 // Set the properties
924 for ( ; atts != NULL && *atts != NULL; atts += 2 )
925 {
926 if ( strcmp( atts[ 0 ], "name" ) == 0 )
927 context->property = strdup( atts[ 1 ] );
928 else if ( strcmp( atts[ 0 ], "value" ) == 0 )
929 value = (char*) atts[ 1 ];
930 }
931
932 if ( context->property != NULL && value != NULL )
933 mlt_properties_set( properties, context->property, value );
934
935 // Tell parser to collect any further nodes for serialisation
936 context->is_value = 1;
937
938 context_push_service( context, service, type );
939 }
940 else
941 {
942 fprintf( stderr, "Property without a service '%s'?\n", ( char * )name );
943 }
944 }
945
946 static void on_end_property( deserialise_context context, const xmlChar *name )
947 {
948 enum service_type type;
949 mlt_service service = context_pop_service( context, &type );
950 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
951
952 if ( service != NULL )
953 {
954 // Tell parser to stop building a tree
955 context->is_value = 0;
956
957 // See if there is a xml tree for the value
958 if ( context->property != NULL && context->value_doc != NULL )
959 {
960 xmlChar *value;
961 int size;
962
963 // Serialise the tree to get value
964 xmlDocDumpMemory( context->value_doc, &value, &size );
965 mlt_properties_set( properties, context->property, value );
966 xmlFree( value );
967 xmlFreeDoc( context->value_doc );
968 context->value_doc = NULL;
969 }
970
971 // Close this property handling
972 free( context->property );
973 context->property = NULL;
974
975 context_push_service( context, service, type );
976 }
977 else
978 {
979 fprintf( stderr, "Property without a service '%s'??\n", (char *)name );
980 }
981 }
982
983 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
984 {
985 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
986 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
987
988 //printf("on_start_element: %s\n", name );
989 context->branch[ context->depth ] ++;
990 context->depth ++;
991
992 // Build a tree from nodes within a property value
993 if ( context->is_value == 1 )
994 {
995 xmlNodePtr node = xmlNewNode( NULL, name );
996
997 if ( context->value_doc == NULL )
998 {
999 // Start a new tree
1000 context->value_doc = xmlNewDoc( "1.0" );
1001 xmlDocSetRootElement( context->value_doc, node );
1002 }
1003 else
1004 {
1005 // Append child to tree
1006 xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node );
1007 }
1008 context_push_node( context, node );
1009
1010 // Set the attributes
1011 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1012 xmlSetProp( node, atts[ 0 ], atts[ 1 ] );
1013 }
1014 else if ( strcmp( name, "tractor" ) == 0 )
1015 on_start_tractor( context, name, atts );
1016 else if ( strcmp( name, "multitrack" ) == 0 )
1017 on_start_multitrack( context, name, atts );
1018 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1019 on_start_playlist( context, name, atts );
1020 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1021 on_start_producer( context, name, atts );
1022 else if ( strcmp( name, "blank" ) == 0 )
1023 on_start_blank( context, name, atts );
1024 else if ( strcmp( name, "entry" ) == 0 )
1025 on_start_entry( context, name, atts );
1026 else if ( strcmp( name, "track" ) == 0 )
1027 on_start_track( context, name, atts );
1028 else if ( strcmp( name, "filter" ) == 0 )
1029 on_start_filter( context, name, atts );
1030 else if ( strcmp( name, "transition" ) == 0 )
1031 on_start_transition( context, name, atts );
1032 else if ( strcmp( name, "property" ) == 0 )
1033 on_start_property( context, name, atts );
1034 else if ( strcmp( name, "westley" ) == 0 )
1035 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1036 mlt_properties_set( context->producer_map, ( char * )atts[ 0 ], ( char * )atts[ 1 ] );
1037 }
1038
1039 static void on_end_element( void *ctx, const xmlChar *name )
1040 {
1041 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1042 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1043
1044 //printf("on_end_element: %s\n", name );
1045 if ( context->is_value == 1 && strcmp( name, "property" ) != 0 )
1046 context_pop_node( context );
1047 else if ( strcmp( name, "multitrack" ) == 0 )
1048 on_end_multitrack( context, name );
1049 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1050 on_end_playlist( context, name );
1051 else if ( strcmp( name, "track" ) == 0 )
1052 on_end_track( context, name );
1053 else if ( strcmp( name, "entry" ) == 0 )
1054 on_end_entry( context, name );
1055 else if ( strcmp( name, "tractor" ) == 0 )
1056 on_end_tractor( context, name );
1057 else if ( strcmp( name, "property" ) == 0 )
1058 on_end_property( context, name );
1059 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1060 on_end_producer( context, name );
1061 else if ( strcmp( name, "filter" ) == 0 )
1062 on_end_filter( context, name );
1063 else if ( strcmp( name, "transition" ) == 0 )
1064 on_end_transition( context, name );
1065
1066 context->branch[ context->depth ] = 0;
1067 context->depth --;
1068 }
1069
1070 static void on_characters( void *ctx, const xmlChar *ch, int len )
1071 {
1072 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1073 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1074 char *value = calloc( len + 1, 1 );
1075 enum service_type type;
1076 mlt_service service = context_pop_service( context, &type );
1077 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1078
1079 if ( service != NULL )
1080 context_push_service( context, service, type );
1081
1082 value[ len ] = 0;
1083 strncpy( value, (const char*) ch, len );
1084
1085 if ( context->stack_node_size > 0 )
1086 xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value );
1087
1088 // libxml2 generates an on_characters immediately after a get_entity within
1089 // an element value, and we ignore it because it is called again during
1090 // actual substitution.
1091 else if ( context->property != NULL && context->entity_is_replace == 0 )
1092 {
1093 char *s = mlt_properties_get( properties, context->property );
1094 if ( s != NULL )
1095 {
1096 // Append new text to existing content
1097 char *new = calloc( strlen( s ) + len + 1, 1 );
1098 strcat( new, s );
1099 strcat( new, value );
1100 mlt_properties_set( properties, context->property, new );
1101 free( new );
1102 }
1103 else
1104 mlt_properties_set( properties, context->property, value );
1105 }
1106 context->entity_is_replace = 0;
1107
1108 free( value);
1109 }
1110
1111 /** Convert parameters parsed from resource into entity declarations.
1112 */
1113 static void params_to_entities( deserialise_context context )
1114 {
1115 if ( context->params != NULL )
1116 {
1117 int i;
1118
1119 // Add our params as entitiy declarations
1120 for ( i = 0; i < mlt_properties_count( context->params ); i++ )
1121 {
1122 xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i );
1123 xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY,
1124 context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, name ) );
1125 }
1126
1127 // Flag completion
1128 mlt_properties_close( context->params );
1129 context->params = NULL;
1130 }
1131 }
1132
1133 // The following 3 facilitate entity substitution in the SAX parser
1134 static void on_internal_subset( void *ctx, const xmlChar* name,
1135 const xmlChar* publicId, const xmlChar* systemId )
1136 {
1137 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1138 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1139
1140 context->publicId = publicId;
1141 context->systemId = systemId;
1142 xmlCreateIntSubset( context->entity_doc, name, publicId, systemId );
1143
1144 // Override default entities with our parameters
1145 params_to_entities( context );
1146 }
1147
1148 static void on_entity_declaration( void *ctx, const xmlChar* name, int type,
1149 const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
1150 {
1151 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1152 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1153
1154 xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content );
1155 }
1156
1157 xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name )
1158 {
1159 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1160 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1161 xmlEntityPtr e = NULL;
1162
1163 // Setup for entity declarations if not ready
1164 if ( xmlGetIntSubset( context->entity_doc ) == NULL )
1165 {
1166 xmlCreateIntSubset( context->entity_doc, "westley", "", "" );
1167 context->publicId = "";
1168 context->systemId = "";
1169 }
1170
1171 // Add our parameters if not already
1172 params_to_entities( context );
1173
1174 e = xmlGetDocEntity( context->entity_doc, name );
1175
1176 // Send signal to on_characters that an entity substitutin is pending
1177 if ( e != NULL )
1178 context->entity_is_replace = 1;
1179
1180 return e;
1181 }
1182
1183 /** Convert a hexadecimal character to its value.
1184 */
1185 static int tohex( char p )
1186 {
1187 return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10;
1188 }
1189
1190 /** Decode a url-encoded string containing hexadecimal character sequences.
1191 */
1192 static char *url_decode( char *dest, char *src )
1193 {
1194 char *p = dest;
1195
1196 while ( *src )
1197 {
1198 if ( *src == '%' )
1199 {
1200 *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) );
1201 src += 3;
1202 }
1203 else
1204 {
1205 *p ++ = *src ++;
1206 }
1207 }
1208
1209 *p = *src;
1210 return dest;
1211 }
1212
1213 /** Extract the filename from a URL attaching parameters to a properties list.
1214 */
1215 static void parse_url( mlt_properties properties, char *url )
1216 {
1217 int i;
1218 int n = strlen( url );
1219 char *name = NULL;
1220 char *value = NULL;
1221
1222 for ( i = 0; i < n; i++ )
1223 {
1224 switch ( url[ i ] )
1225 {
1226 case '?':
1227 url[ i++ ] = '\0';
1228 name = &url[ i ];
1229 break;
1230
1231 case ':':
1232 case '=':
1233 url[ i++ ] = '\0';
1234 value = &url[ i ];
1235 break;
1236
1237 case '&':
1238 url[ i++ ] = '\0';
1239 if ( name != NULL && value != NULL )
1240 mlt_properties_set( properties, name, value );
1241 name = &url[ i ];
1242 value = NULL;
1243 break;
1244 }
1245 }
1246 if ( name != NULL && value != NULL )
1247 mlt_properties_set( properties, name, value );
1248 }
1249
1250 mlt_producer producer_westley_init( int info, char *data )
1251 {
1252 if ( data == NULL )
1253 return NULL;
1254 xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
1255 struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
1256 mlt_properties properties = NULL;
1257 int i = 0;
1258 struct _xmlParserCtxt *xmlcontext;
1259 int well_formed = 0;
1260 char *filename = NULL;
1261
1262 context->producer_map = mlt_properties_new();
1263 context->destructors = mlt_properties_new();
1264 context->params = mlt_properties_new();
1265
1266 // Decode URL and parse parameters
1267 mlt_properties_set( context->producer_map, "root", "" );
1268 if ( info == 0 )
1269 {
1270 filename = strdup( data );
1271 parse_url( context->params, url_decode( filename, data ) );
1272
1273 // We need the directory prefix which was used for the westley
1274 if ( strchr( filename, '/' ) )
1275 {
1276 char *root = NULL;
1277 mlt_properties_set( context->producer_map, "root", filename );
1278 root = mlt_properties_get( context->producer_map, "root" );
1279 *( strrchr( root, '/' ) ) = '\0';
1280
1281 // If we don't have an absolute path here, we're heading for disaster...
1282 if ( root[ 0 ] != '/' )
1283 {
1284 char *cwd = getcwd( NULL, 0 );
1285 char *real = malloc( strlen( cwd ) + strlen( root ) + 2 );
1286 sprintf( real, "%s/%s", cwd, root );
1287 mlt_properties_set( context->producer_map, "root", real );
1288 free( real );
1289 free( cwd );
1290 }
1291 }
1292 }
1293
1294 // We need to track the number of registered filters
1295 mlt_properties_set_int( context->destructors, "registered", 0 );
1296
1297 // Setup SAX callbacks
1298 sax->startElement = on_start_element;
1299 sax->endElement = on_end_element;
1300 sax->characters = on_characters;
1301 sax->cdataBlock = on_characters;
1302 sax->internalSubset = on_internal_subset;
1303 sax->entityDecl = on_entity_declaration;
1304 sax->getEntity = on_get_entity;
1305
1306 // Setup libxml2 SAX parsing
1307 xmlInitParser();
1308 xmlSubstituteEntitiesDefault( 1 );
1309 // This is used to facilitate entity substitution in the SAX parser
1310 context->entity_doc = xmlNewDoc( "1.0" );
1311 if ( info == 0 )
1312 xmlcontext = xmlCreateFileParserCtxt( filename );
1313 else
1314 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1315
1316 // Invalid context - clean up and return NULL
1317 if ( xmlcontext == NULL )
1318 {
1319 mlt_properties_close( context->producer_map );
1320 mlt_properties_close( context->destructors );
1321 mlt_properties_close( context->params );
1322 free( context );
1323 free( sax );
1324 free( filename );
1325 return NULL;
1326 }
1327
1328 xmlcontext->sax = sax;
1329 xmlcontext->_private = ( void* )context;
1330
1331 // Parse
1332 xmlParseDocument( xmlcontext );
1333 well_formed = xmlcontext->wellFormed;
1334
1335 // Cleanup after parsing
1336 xmlFreeDoc( context->entity_doc );
1337 free( sax );
1338 xmlcontext->sax = NULL;
1339 xmlcontext->_private = NULL;
1340 xmlFreeParserCtxt( xmlcontext );
1341 xmlMemoryDump( ); // for debugging
1342
1343 // Get the last producer on the stack
1344 enum service_type type;
1345 mlt_service service = context_pop_service( context, &type );
1346 if ( well_formed && service != NULL )
1347 {
1348 // Verify it is a producer service (mlt_type="mlt_producer")
1349 // (producer, playlist, multitrack)
1350 char *type = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "mlt_type" );
1351 if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 && strcmp( type, "producer" ) != 0 ) )
1352 service = NULL;
1353 }
1354
1355 #ifdef DEBUG
1356 xmlDocPtr doc = westley_make_doc( service );
1357 xmlDocFormatDump( stdout, doc, 1 );
1358 xmlFreeDoc( doc );
1359 service = NULL;
1360 #endif
1361
1362 if ( well_formed && service != NULL )
1363 {
1364 char *title = mlt_properties_get( context->producer_map, "title" );
1365
1366 // Need the complete producer list for various reasons
1367 properties = context->destructors;
1368
1369 // Now make sure we don't have a reference to the service in the properties
1370 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
1371 {
1372 char *name = mlt_properties_get_name( properties, i );
1373 if ( mlt_properties_get_data( properties, name, NULL ) == service )
1374 {
1375 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
1376 break;
1377 }
1378 }
1379
1380 // We are done referencing destructor property list
1381 // Set this var to service properties for convenience
1382 properties = MLT_SERVICE_PROPERTIES( service );
1383
1384 // Assign the title
1385 mlt_properties_set( properties, "title", title );
1386
1387 // Optimise for overlapping producers
1388 mlt_producer_optimise( MLT_PRODUCER( service ) );
1389
1390 // Handle deep copies
1391 if ( getenv( "MLT_WESTLEY_DEEP" ) == NULL )
1392 {
1393 // Now assign additional properties
1394 if ( info == 0 )
1395 mlt_properties_set( properties, "resource", data );
1396
1397 // This tells consumer_westley not to deep copy
1398 mlt_properties_set( properties, "westley", "was here" );
1399 }
1400 else
1401 {
1402 // Allow the project to be edited
1403 mlt_properties_set( properties, "_westley", "was here" );
1404 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
1405 }
1406 }
1407 else
1408 {
1409 // Return null if not well formed
1410 service = NULL;
1411 }
1412
1413 // Clean up
1414 mlt_properties_close( context->producer_map );
1415 if ( context->params != NULL )
1416 mlt_properties_close( context->params );
1417 mlt_properties_close( context->destructors );
1418 free( context );
1419 free( filename );
1420
1421 return MLT_PRODUCER( service );
1422 }