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Improved push capabilities
[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_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( deserialise_context context, const xmlChar *name, const xmlChar **atts)
603 {
604 mlt_producer entry = NULL;
605 mlt_properties temp = mlt_properties_new( );
606
607 for ( ; atts != NULL && *atts != NULL; atts += 2 )
608 {
609 mlt_properties_set( temp, (char*) atts[0], (char*) atts[1] );
610
611 // Look for the producer attribute
612 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
613 {
614 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
615 if ( producer != NULL )
616 mlt_properties_set_data( temp, "producer", producer, 0, NULL, NULL );
617 }
618 }
619
620 // If we have a valid entry
621 if ( mlt_properties_get_data( temp, "producer", NULL ) != NULL )
622 {
623 mlt_playlist_clip_info info;
624 enum service_type parent_type;
625 mlt_service parent = context_pop_service( context, &parent_type );
626 mlt_producer producer = mlt_properties_get_data( temp, "producer", NULL );
627
628 if ( parent_type == mlt_playlist_type )
629 {
630 // Append the producer to the playlist
631 if ( mlt_properties_get( temp, "in" ) != NULL || mlt_properties_get( temp, "out" ) != NULL )
632 {
633 mlt_playlist_append_io( MLT_PLAYLIST( parent ), producer,
634 mlt_properties_get_position( temp, "in" ),
635 mlt_properties_get_position( temp, "out" ) );
636 }
637 else
638 {
639 mlt_playlist_append( MLT_PLAYLIST( parent ), producer );
640 }
641
642 // Handle the repeat property
643 if ( mlt_properties_get_int( temp, "repeat" ) > 0 )
644 {
645 mlt_playlist_repeat_clip( MLT_PLAYLIST( parent ),
646 mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1,
647 mlt_properties_get_int( temp, "repeat" ) );
648 }
649
650 mlt_playlist_get_clip_info( MLT_PLAYLIST( parent ), &info, mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1 );
651 entry = info.cut;
652 }
653 else
654 {
655 fprintf( stderr, "Entry not part of a playlist...\n" );
656 }
657
658 context_push_service( context, parent, parent_type );
659 }
660
661 // Push the cut onto the stack
662 context_push_service( context, mlt_producer_service( entry ), mlt_entry_type );
663
664 mlt_properties_close( temp );
665 }
666
667 static void on_end_entry( deserialise_context context, const xmlChar *name )
668 {
669 // Get the entry from the stack
670 enum service_type entry_type;
671 mlt_service entry = context_pop_service( context, &entry_type );
672
673 if ( entry == NULL && entry_type != mlt_entry_type )
674 {
675 fprintf( stderr, "Invalid state at end of entry\n" );
676 }
677 }
678
679 static void on_start_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
680 {
681 // use a dummy service to hold properties to allow arbitrary nesting
682 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
683 mlt_service_init( service, NULL );
684
685 // Push the dummy service onto the stack
686 context_push_service( context, service, mlt_entry_type );
687
688 mlt_properties_set( mlt_service_properties( service ), "resource", "<track>" );
689
690 for ( ; atts != NULL && *atts != NULL; atts += 2 )
691 {
692 mlt_properties_set( mlt_service_properties( service ), (char*) atts[0], (char*) atts[1] );
693
694 // Look for the producer attribute
695 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
696 {
697 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
698 if ( producer != NULL )
699 mlt_properties_set_data( mlt_service_properties( service ), "producer", producer, 0, NULL, NULL );
700 }
701 }
702 }
703
704 static void on_end_track( deserialise_context context, const xmlChar *name )
705 {
706 // Get the track from the stack
707 enum service_type track_type;
708 mlt_service track = context_pop_service( context, &track_type );
709
710 if ( track != NULL && track_type == mlt_entry_type )
711 {
712 mlt_properties track_props = mlt_service_properties( track );
713 enum service_type parent_type;
714 mlt_service parent = context_pop_service( context, &parent_type );
715 mlt_multitrack multitrack = NULL;
716
717 mlt_producer producer = mlt_properties_get_data( track_props, "producer", NULL );
718 mlt_properties producer_props = mlt_producer_properties( producer );
719
720 if ( parent_type == mlt_tractor_type )
721 multitrack = mlt_tractor_multitrack( MLT_TRACTOR( parent ) );
722 else if ( parent_type == mlt_multitrack_type )
723 multitrack = MLT_MULTITRACK( parent );
724 else
725 fprintf( stderr, "track contained in an invalid container\n" );
726
727 if ( multitrack != NULL )
728 {
729 // Set producer i/o if specified
730 if ( mlt_properties_get( track_props, "in" ) != NULL ||
731 mlt_properties_get( track_props, "out" ) != NULL )
732 {
733 if ( mlt_properties_get( track_props, "out" ) == NULL )
734 mlt_properties_set_position( track_props, "out", mlt_properties_get_position( track_props, "length" ) - 1 );
735 mlt_producer cut = mlt_producer_cut( MLT_PRODUCER( producer ),
736 mlt_properties_get_position( track_props, "in" ),
737 mlt_properties_get_position( track_props, "out" ) );
738 mlt_properties_set_int( mlt_producer_properties( cut ), "cut", 1 );
739 mlt_multitrack_connect( multitrack, cut, mlt_multitrack_count( multitrack ) );
740 mlt_producer_close( cut );
741 }
742 else
743 {
744 mlt_multitrack_connect( multitrack, producer, mlt_multitrack_count( multitrack ) );
745 }
746
747 // Set the hide state of the track producer
748 char *hide_s = mlt_properties_get( track_props, "hide" );
749 if ( hide_s != NULL )
750 {
751 if ( strcmp( hide_s, "video" ) == 0 )
752 mlt_properties_set_int( producer_props, "hide", 1 );
753 else if ( strcmp( hide_s, "audio" ) == 0 )
754 mlt_properties_set_int( producer_props, "hide", 2 );
755 else if ( strcmp( hide_s, "both" ) == 0 )
756 mlt_properties_set_int( producer_props, "hide", 3 );
757 }
758 }
759
760 if ( parent != NULL )
761 context_push_service( context, parent, parent_type );
762
763 mlt_service_close( track );
764 }
765 else
766 {
767 fprintf( stderr, "Invalid state at end of track\n" );
768 }
769 }
770
771 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
772 {
773 // use a dummy service to hold properties to allow arbitrary nesting
774 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
775 mlt_service_init( service, NULL );
776
777 mlt_properties properties = mlt_service_properties( service );
778
779 context_push_service( context, service, mlt_dummy_filter_type );
780
781 // Set the properties
782 for ( ; atts != NULL && *atts != NULL; atts += 2 )
783 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
784 }
785
786 static void on_end_filter( deserialise_context context, const xmlChar *name )
787 {
788 enum service_type type;
789 mlt_service service = context_pop_service( context, &type );
790 mlt_properties properties = mlt_service_properties( service );
791
792 enum service_type parent_type;
793 mlt_service parent = context_pop_service( context, &parent_type );
794
795 if ( service != NULL && type == mlt_dummy_filter_type )
796 {
797 mlt_service filter = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
798 mlt_properties filter_props = mlt_service_properties( filter );
799
800 track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
801
802 // Propogate the properties
803 qualify_property( context, properties, "resource" );
804 qualify_property( context, properties, "luma" );
805 qualify_property( context, properties, "luma.resource" );
806 qualify_property( context, properties, "composite.luma" );
807 qualify_property( context, properties, "producer.resource" );
808 mlt_properties_inherit( filter_props, properties );
809
810 // Attach all filters from service onto filter
811 attach_filters( filter, service );
812
813 // Associate the filter with the parent
814 if ( parent != NULL )
815 {
816 if ( parent_type == mlt_tractor_type )
817 {
818 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
819 mlt_field_plant_filter( field, MLT_FILTER( filter ), mlt_properties_get_int( properties, "track" ) );
820 mlt_filter_set_in_and_out( MLT_FILTER( filter ),
821 mlt_properties_get_int( properties, "in" ),
822 mlt_properties_get_int( properties, "out" ) );
823 }
824 else
825 {
826 mlt_service_attach( parent, MLT_FILTER( filter ) );
827 }
828
829 // Put the parent back on the stack
830 context_push_service( context, parent, parent_type );
831 }
832 else
833 {
834 fprintf( stderr, "filter closed with invalid parent...\n" );
835 }
836
837 // Close the dummy filter service
838 mlt_service_close( service );
839 }
840 else
841 {
842 fprintf( stderr, "Invalid top of stack on filter close\n" );
843 }
844 }
845
846 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
847 {
848 // use a dummy service to hold properties to allow arbitrary nesting
849 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
850 mlt_service_init( service, NULL );
851
852 mlt_properties properties = mlt_service_properties( service );
853
854 context_push_service( context, service, mlt_dummy_transition_type );
855
856 // Set the properties
857 for ( ; atts != NULL && *atts != NULL; atts += 2 )
858 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
859 }
860
861 static void on_end_transition( deserialise_context context, const xmlChar *name )
862 {
863 enum service_type type;
864 mlt_service service = context_pop_service( context, &type );
865 mlt_properties properties = mlt_service_properties( service );
866
867 enum service_type parent_type;
868 mlt_service parent = context_pop_service( context, &parent_type );
869
870 if ( service != NULL && type == mlt_dummy_transition_type )
871 {
872 mlt_service effect = MLT_SERVICE( mlt_factory_transition(mlt_properties_get(properties,"mlt_service"), NULL ) );
873 mlt_properties effect_props = mlt_service_properties( effect );
874
875 track_service( context->destructors, effect, (mlt_destructor) mlt_transition_close );
876
877 // Propogate the properties
878 qualify_property( context, properties, "resource" );
879 qualify_property( context, properties, "luma" );
880 qualify_property( context, properties, "luma.resource" );
881 qualify_property( context, properties, "composite.luma" );
882 qualify_property( context, properties, "producer.resource" );
883 mlt_properties_inherit( effect_props, properties );
884
885 // Attach all filters from service onto effect
886 attach_filters( effect, service );
887
888 // Associate the filter with the parent
889 if ( parent != NULL )
890 {
891 if ( parent_type == mlt_tractor_type )
892 {
893 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
894 if ( mlt_properties_get_int( properties, "a_track" ) == mlt_properties_get_int( properties, "b_track" ) )
895 mlt_properties_set_int( properties, "b_track", mlt_properties_get_int( properties, "a_track" ) + 1 );
896 mlt_field_plant_transition( field, MLT_TRANSITION( effect ),
897 mlt_properties_get_int( properties, "a_track" ),
898 mlt_properties_get_int( properties, "b_track" ) );
899 mlt_transition_set_in_and_out( MLT_TRANSITION( effect ),
900 mlt_properties_get_int( properties, "in" ),
901 mlt_properties_get_int( properties, "out" ) );
902 }
903 else
904 {
905 fprintf( stderr, "Misplaced transition - ignoring\n" );
906 }
907
908 // Put the parent back on the stack
909 context_push_service( context, parent, parent_type );
910 }
911 else
912 {
913 fprintf( stderr, "transition closed with invalid parent...\n" );
914 }
915
916 // Close the dummy filter service
917 mlt_service_close( service );
918 }
919 else
920 {
921 fprintf( stderr, "Invalid top of stack on transition close\n" );
922 }
923 }
924
925 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
926 {
927 enum service_type type;
928 mlt_service service = context_pop_service( context, &type );
929 mlt_properties properties = mlt_service_properties( service );
930 char *value = NULL;
931
932 if ( service != NULL )
933 {
934 // Set the properties
935 for ( ; atts != NULL && *atts != NULL; atts += 2 )
936 {
937 if ( strcmp( atts[ 0 ], "name" ) == 0 )
938 context->property = strdup( atts[ 1 ] );
939 else if ( strcmp( atts[ 0 ], "value" ) == 0 )
940 value = (char*) atts[ 1 ];
941 }
942
943 if ( context->property != NULL && value != NULL )
944 mlt_properties_set( properties, context->property, value );
945
946 // Tell parser to collect any further nodes for serialisation
947 context->is_value = 1;
948
949 context_push_service( context, service, type );
950 }
951 else
952 {
953 fprintf( stderr, "Property without a service '%s'?\n", ( char * )name );
954 }
955 }
956
957 static void on_end_property( deserialise_context context, const xmlChar *name )
958 {
959 enum service_type type;
960 mlt_service service = context_pop_service( context, &type );
961 mlt_properties properties = mlt_service_properties( service );
962
963 if ( service != NULL )
964 {
965 // Tell parser to stop building a tree
966 context->is_value = 0;
967
968 // See if there is a xml tree for the value
969 if ( context->property != NULL && context->value_doc != NULL )
970 {
971 xmlChar *value;
972 int size;
973
974 // Serialise the tree to get value
975 xmlDocDumpMemory( context->value_doc, &value, &size );
976 mlt_properties_set( properties, context->property, value );
977 xmlFree( value );
978 xmlFreeDoc( context->value_doc );
979 context->value_doc = NULL;
980 }
981
982 // Close this property handling
983 free( context->property );
984 context->property = NULL;
985
986 context_push_service( context, service, type );
987 }
988 else
989 {
990 fprintf( stderr, "Property without a service '%s'??\n", (char *)name );
991 }
992 }
993
994 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
995 {
996 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
997 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
998
999 //printf("on_start_element: %s\n", name );
1000 context->branch[ context->depth ] ++;
1001 context->depth ++;
1002
1003 // Build a tree from nodes within a property value
1004 if ( context->is_value == 1 )
1005 {
1006 xmlNodePtr node = xmlNewNode( NULL, name );
1007
1008 if ( context->value_doc == NULL )
1009 {
1010 // Start a new tree
1011 context->value_doc = xmlNewDoc( "1.0" );
1012 xmlDocSetRootElement( context->value_doc, node );
1013 }
1014 else
1015 {
1016 // Append child to tree
1017 xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node );
1018 }
1019 context_push_node( context, node );
1020
1021 // Set the attributes
1022 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1023 xmlSetProp( node, atts[ 0 ], atts[ 1 ] );
1024 }
1025 else if ( strcmp( name, "tractor" ) == 0 )
1026 on_start_tractor( context, name, atts );
1027 else if ( strcmp( name, "multitrack" ) == 0 )
1028 on_start_multitrack( context, name, atts );
1029 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1030 on_start_playlist( context, name, atts );
1031 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1032 on_start_producer( context, name, atts );
1033 else if ( strcmp( name, "blank" ) == 0 )
1034 on_start_blank( context, name, atts );
1035 else if ( strcmp( name, "entry" ) == 0 )
1036 on_start_entry( context, name, atts );
1037 else if ( strcmp( name, "track" ) == 0 )
1038 on_start_track( context, name, atts );
1039 else if ( strcmp( name, "filter" ) == 0 )
1040 on_start_filter( context, name, atts );
1041 else if ( strcmp( name, "transition" ) == 0 )
1042 on_start_transition( context, name, atts );
1043 else if ( strcmp( name, "property" ) == 0 )
1044 on_start_property( context, name, atts );
1045 else if ( strcmp( name, "westley" ) == 0 )
1046 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1047 mlt_properties_set( context->producer_map, ( char * )atts[ 0 ], ( char * )atts[ 1 ] );
1048 }
1049
1050 static void on_end_element( void *ctx, const xmlChar *name )
1051 {
1052 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1053 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1054
1055 //printf("on_end_element: %s\n", name );
1056 if ( context->is_value == 1 && strcmp( name, "property" ) != 0 )
1057 context_pop_node( context );
1058 else if ( strcmp( name, "multitrack" ) == 0 )
1059 on_end_multitrack( context, name );
1060 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1061 on_end_playlist( context, name );
1062 else if ( strcmp( name, "track" ) == 0 )
1063 on_end_track( context, name );
1064 else if ( strcmp( name, "entry" ) == 0 )
1065 on_end_entry( context, name );
1066 else if ( strcmp( name, "tractor" ) == 0 )
1067 on_end_tractor( context, name );
1068 else if ( strcmp( name, "property" ) == 0 )
1069 on_end_property( context, name );
1070 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1071 on_end_producer( context, name );
1072 else if ( strcmp( name, "filter" ) == 0 )
1073 on_end_filter( context, name );
1074 else if ( strcmp( name, "transition" ) == 0 )
1075 on_end_transition( context, name );
1076
1077 context->branch[ context->depth ] = 0;
1078 context->depth --;
1079 }
1080
1081 static void on_characters( void *ctx, const xmlChar *ch, int len )
1082 {
1083 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1084 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1085 char *value = calloc( len + 1, 1 );
1086 enum service_type type;
1087 mlt_service service = context_pop_service( context, &type );
1088 mlt_properties properties = mlt_service_properties( service );
1089
1090 if ( service != NULL )
1091 context_push_service( context, service, type );
1092
1093 value[ len ] = 0;
1094 strncpy( value, (const char*) ch, len );
1095
1096 if ( context->stack_node_size > 0 )
1097 xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value );
1098
1099 // libxml2 generates an on_characters immediately after a get_entity within
1100 // an element value, and we ignore it because it is called again during
1101 // actual substitution.
1102 else if ( context->property != NULL && context->entity_is_replace == 0 )
1103 {
1104 char *s = mlt_properties_get( properties, context->property );
1105 if ( s != NULL )
1106 {
1107 // Append new text to existing content
1108 char *new = calloc( strlen( s ) + len + 1, 1 );
1109 strcat( new, s );
1110 strcat( new, value );
1111 mlt_properties_set( properties, context->property, new );
1112 free( new );
1113 }
1114 else
1115 mlt_properties_set( properties, context->property, value );
1116 }
1117 context->entity_is_replace = 0;
1118
1119 free( value);
1120 }
1121
1122 /** Convert parameters parsed from resource into entity declarations.
1123 */
1124 static void params_to_entities( deserialise_context context )
1125 {
1126 if ( context->params != NULL )
1127 {
1128 int i;
1129
1130 // Add our params as entitiy declarations
1131 for ( i = 0; i < mlt_properties_count( context->params ); i++ )
1132 {
1133 xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i );
1134 xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY,
1135 context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, name ) );
1136 }
1137
1138 // Flag completion
1139 mlt_properties_close( context->params );
1140 context->params = NULL;
1141 }
1142 }
1143
1144 // The following 3 facilitate entity substitution in the SAX parser
1145 static void on_internal_subset( void *ctx, const xmlChar* name,
1146 const xmlChar* publicId, const xmlChar* systemId )
1147 {
1148 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1149 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1150
1151 context->publicId = publicId;
1152 context->systemId = systemId;
1153 xmlCreateIntSubset( context->entity_doc, name, publicId, systemId );
1154
1155 // Override default entities with our parameters
1156 params_to_entities( context );
1157 }
1158
1159 static void on_entity_declaration( void *ctx, const xmlChar* name, int type,
1160 const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
1161 {
1162 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1163 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1164
1165 xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content );
1166 }
1167
1168 xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name )
1169 {
1170 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1171 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1172 xmlEntityPtr e = NULL;
1173
1174 // Setup for entity declarations if not ready
1175 if ( xmlGetIntSubset( context->entity_doc ) == NULL )
1176 {
1177 xmlCreateIntSubset( context->entity_doc, "westley", "", "" );
1178 context->publicId = "";
1179 context->systemId = "";
1180 }
1181
1182 // Add our parameters if not already
1183 params_to_entities( context );
1184
1185 e = xmlGetDocEntity( context->entity_doc, name );
1186
1187 // Send signal to on_characters that an entity substitutin is pending
1188 if ( e != NULL )
1189 context->entity_is_replace = 1;
1190
1191 return e;
1192 }
1193
1194 /** Convert a hexadecimal character to its value.
1195 */
1196 static int tohex( char p )
1197 {
1198 return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10;
1199 }
1200
1201 /** Decode a url-encoded string containing hexadecimal character sequences.
1202 */
1203 static char *url_decode( char *dest, char *src )
1204 {
1205 char *p = dest;
1206
1207 while ( *src )
1208 {
1209 if ( *src == '%' )
1210 {
1211 *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) );
1212 src += 3;
1213 }
1214 else
1215 {
1216 *p ++ = *src ++;
1217 }
1218 }
1219
1220 *p = *src;
1221 return dest;
1222 }
1223
1224 /** Extract the filename from a URL attaching parameters to a properties list.
1225 */
1226 static void parse_url( mlt_properties properties, char *url )
1227 {
1228 int i;
1229 int n = strlen( url );
1230 char *name = NULL;
1231 char *value = NULL;
1232
1233 for ( i = 0; i < n; i++ )
1234 {
1235 switch ( url[ i ] )
1236 {
1237 case '?':
1238 url[ i++ ] = '\0';
1239 name = &url[ i ];
1240 break;
1241
1242 case ':':
1243 case '=':
1244 url[ i++ ] = '\0';
1245 value = &url[ i ];
1246 break;
1247
1248 case '&':
1249 url[ i++ ] = '\0';
1250 if ( name != NULL && value != NULL )
1251 mlt_properties_set( properties, name, value );
1252 name = &url[ i ];
1253 value = NULL;
1254 break;
1255 }
1256 }
1257 if ( name != NULL && value != NULL )
1258 mlt_properties_set( properties, name, value );
1259 }
1260
1261 mlt_producer producer_westley_init( int info, char *data )
1262 {
1263 if ( data == NULL )
1264 return NULL;
1265 xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
1266 struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
1267 mlt_properties properties = NULL;
1268 int i = 0;
1269 struct _xmlParserCtxt *xmlcontext;
1270 int well_formed = 0;
1271 char *filename = NULL;
1272
1273 context->producer_map = mlt_properties_new();
1274 context->destructors = mlt_properties_new();
1275 context->params = mlt_properties_new();
1276
1277 // Decode URL and parse parameters
1278 mlt_properties_set( context->producer_map, "root", "" );
1279 if ( info == 0 )
1280 {
1281 filename = strdup( data );
1282 parse_url( context->params, url_decode( filename, data ) );
1283
1284 // We need the directory prefix which was used for the westley
1285 if ( strchr( filename, '/' ) )
1286 {
1287 char *root = NULL;
1288 mlt_properties_set( context->producer_map, "root", filename );
1289 root = mlt_properties_get( context->producer_map, "root" );
1290 *( strrchr( root, '/' ) ) = '\0';
1291
1292 // If we don't have an absolute path here, we're heading for disaster...
1293 if ( root[ 0 ] != '/' )
1294 {
1295 char *cwd = getcwd( NULL, 0 );
1296 char *real = malloc( strlen( cwd ) + strlen( root ) + 2 );
1297 sprintf( real, "%s/%s", cwd, root );
1298 mlt_properties_set( context->producer_map, "root", real );
1299 free( real );
1300 free( cwd );
1301 }
1302 }
1303 }
1304
1305 // We need to track the number of registered filters
1306 mlt_properties_set_int( context->destructors, "registered", 0 );
1307
1308 // Setup SAX callbacks
1309 sax->startElement = on_start_element;
1310 sax->endElement = on_end_element;
1311 sax->characters = on_characters;
1312 sax->cdataBlock = on_characters;
1313 sax->internalSubset = on_internal_subset;
1314 sax->entityDecl = on_entity_declaration;
1315 sax->getEntity = on_get_entity;
1316
1317 // Setup libxml2 SAX parsing
1318 xmlInitParser();
1319 xmlSubstituteEntitiesDefault( 1 );
1320 // This is used to facilitate entity substitution in the SAX parser
1321 context->entity_doc = xmlNewDoc( "1.0" );
1322 if ( info == 0 )
1323 xmlcontext = xmlCreateFileParserCtxt( filename );
1324 else
1325 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1326
1327 xmlcontext->sax = sax;
1328 xmlcontext->_private = ( void* )context;
1329
1330 // Parse
1331 xmlParseDocument( xmlcontext );
1332 well_formed = xmlcontext->wellFormed;
1333
1334 // Cleanup after parsing
1335 xmlFreeDoc( context->entity_doc );
1336 free( sax );
1337 xmlcontext->sax = NULL;
1338 xmlcontext->_private = NULL;
1339 xmlFreeParserCtxt( xmlcontext );
1340 xmlMemoryDump( ); // for debugging
1341
1342 // Get the last producer on the stack
1343 enum service_type type;
1344 mlt_service service = context_pop_service( context, &type );
1345 if ( well_formed && service != NULL )
1346 {
1347 // Verify it is a producer service (mlt_type="mlt_producer")
1348 // (producer, playlist, multitrack)
1349 char *type = mlt_properties_get( mlt_service_properties( service ), "mlt_type" );
1350 if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 && strcmp( type, "producer" ) != 0 ) )
1351 service = NULL;
1352 }
1353
1354 #ifdef DEBUG
1355 xmlDocPtr doc = westley_make_doc( service );
1356 xmlDocFormatDump( stdout, doc, 1 );
1357 xmlFreeDoc( doc );
1358 service = NULL;
1359 #endif
1360
1361 if ( well_formed && service != NULL )
1362 {
1363 char *title = mlt_properties_get( context->producer_map, "title" );
1364
1365 // Need the complete producer list for various reasons
1366 properties = context->destructors;
1367
1368 // Now make sure we don't have a reference to the service in the properties
1369 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
1370 {
1371 char *name = mlt_properties_get_name( properties, i );
1372 if ( mlt_properties_get_data( properties, name, NULL ) == service )
1373 {
1374 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
1375 break;
1376 }
1377 }
1378
1379 // We are done referencing destructor property list
1380 // Set this var to service properties for convenience
1381 properties = mlt_service_properties( service );
1382
1383 // make the returned service destroy the connected services
1384 mlt_properties_set_data( properties, "__destructors__", context->destructors, 0, (mlt_destructor) mlt_properties_close, NULL );
1385
1386 // Assign the title
1387 mlt_properties_set( properties, "title", title );
1388
1389 // Optimise for overlapping producers
1390 mlt_producer_optimise( MLT_PRODUCER( service ) );
1391
1392 // Handle deep copies
1393 if ( getenv( "MLT_WESTLEY_DEEP" ) == NULL )
1394 {
1395 // Now assign additional properties
1396 if ( info == 0 )
1397 mlt_properties_set( properties, "resource", data );
1398
1399 // This tells consumer_westley not to deep copy
1400 mlt_properties_set( properties, "westley", "was here" );
1401 }
1402 else
1403 {
1404 // Allow the project to be edited
1405 mlt_properties_set( properties, "_westley", "was here" );
1406 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
1407 }
1408 }
1409 else
1410 {
1411 // Return null if not well formed
1412 service = NULL;
1413
1414 // Clean up
1415 mlt_properties_close( context->destructors );
1416 }
1417
1418 // Clean up
1419 mlt_properties_close( context->producer_map );
1420 if ( context->params != NULL )
1421 mlt_properties_close( context->params );
1422 free( context );
1423 free( filename );
1424
1425 return MLT_PRODUCER( service );
1426 }
my melted branch