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+ Indicator for missing media replacement in case pango doesn't exist
[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], atts[1] == NULL ? "" : (char*) atts[1] );
298
299 mlt_properties_set_int( MLT_TRACTOR_PROPERTIES( tractor ), "global_feed", 1 );
300
301 if ( mlt_properties_get( properties, "id" ) != NULL )
302 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
303
304 context_push_service( context, service, mlt_tractor_type );
305 }
306
307 static void on_end_tractor( deserialise_context context, const xmlChar *name )
308 {
309 // Get the tractor
310 enum service_type type;
311 mlt_service tractor = context_pop_service( context, &type );
312
313 if ( tractor != NULL && type == mlt_tractor_type )
314 {
315 // See if the tractor should be added to a playlist or multitrack
316 if ( add_producer( context, tractor, 0, mlt_producer_get_out( MLT_PRODUCER( tractor ) ) ) == 0 )
317 context_push_service( context, tractor, type );
318 }
319 else
320 {
321 fprintf( stderr, "Invalid state for tractor\n" );
322 }
323 }
324
325 static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
326 {
327 enum service_type type;
328 mlt_service parent = context_pop_service( context, &type );
329
330 // If we don't have a parent, then create one now, providing we're in a state where we can
331 if ( parent == NULL || ( type == mlt_playlist_type || type == mlt_multitrack_type ) )
332 {
333 mlt_tractor tractor = NULL;
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 tractor = mlt_tractor_new( );
340 parent = MLT_TRACTOR_SERVICE( tractor );
341 track_service( context->destructors, parent, (mlt_destructor) mlt_tractor_close );
342 type = mlt_tractor_type;
343
344 // Flag it as a synthesised tractor for clean up later
345 mlt_properties_set_int( MLT_SERVICE_PROPERTIES( parent ), "fezzik_synth", 1 );
346 }
347
348 if ( type == mlt_tractor_type )
349 {
350 mlt_service service = MLT_SERVICE( mlt_tractor_multitrack( MLT_TRACTOR( parent ) ) );
351 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
352 for ( ; atts != NULL && *atts != NULL; atts += 2 )
353 mlt_properties_set( properties, (char*) atts[0], atts[1] == NULL ? "" : (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_playlist playlist = mlt_playlist_init( );
380 mlt_service service = MLT_PLAYLIST_SERVICE( playlist );
381 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
382
383 track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
384
385 for ( ; atts != NULL && *atts != NULL; atts += 2 )
386 {
387 mlt_properties_set( properties, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
388
389 // Out will be overwritten later as we append, so we need to save it
390 if ( strcmp( atts[ 0 ], "out" ) == 0 )
391 mlt_properties_set( properties, "_westley.out", ( char* )atts[ 1 ] );
392 }
393
394 if ( mlt_properties_get( properties, "id" ) != NULL )
395 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
396
397 context_push_service( context, service, mlt_playlist_type );
398 }
399
400 static void on_end_playlist( deserialise_context context, const xmlChar *name )
401 {
402 // Get the playlist from the stack
403 enum service_type type;
404 mlt_service service = context_pop_service( context, &type );
405
406 if ( service != NULL && type == mlt_playlist_type )
407 {
408 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
409 mlt_position in = mlt_properties_get_position( properties, "in" );
410 mlt_position out = mlt_properties_get_position( properties, "out" );
411
412 // See if the playlist should be added to a playlist or multitrack
413 if ( add_producer( context, service, in, out ) == 0 )
414 context_push_service( context, service, type );
415 }
416 else
417 {
418 fprintf( stderr, "Invalid state of playlist end\n" );
419 }
420 }
421
422 static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
423 {
424 // use a dummy service to hold properties to allow arbitrary nesting
425 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
426 mlt_service_init( service, NULL );
427
428 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
429
430 context_push_service( context, service, mlt_dummy_producer_type );
431
432 for ( ; atts != NULL && *atts != NULL; atts += 2 )
433 mlt_properties_set( properties, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
434 }
435
436 static void on_end_producer( deserialise_context context, const xmlChar *name )
437 {
438 enum service_type type;
439 mlt_service service = context_pop_service( context, &type );
440 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
441
442 if ( service != NULL && type == mlt_dummy_producer_type )
443 {
444 mlt_service producer = NULL;
445
446 qualify_property( context, properties, "resource" );
447 char *resource = mlt_properties_get( properties, "resource" );
448
449 // Let Kino-SMIL src be a synonym for resource
450 if ( resource == NULL )
451 {
452 qualify_property( context, properties, "src" );
453 resource = mlt_properties_get( properties, "src" );
454 }
455
456 // Instantiate the producer
457 if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
458 {
459 char temp[ 1024 ];
460 strncpy( temp, mlt_properties_get( properties, "mlt_service" ), 1024 );
461 if ( resource != NULL )
462 {
463 strcat( temp, ":" );
464 strncat( temp, resource, 1023 - strlen( temp ) );
465 }
466 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", temp ) );
467 }
468
469 // Just in case the plugin requested doesn't exist...
470 if ( producer == NULL && resource != NULL )
471 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", resource ) );
472
473 if ( producer == NULL )
474 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", "+INVALID.txt" ) );
475
476 if ( producer == NULL )
477 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", "colour:red" ) );
478
479 // Track this producer
480 track_service( context->destructors, producer, (mlt_destructor) mlt_producer_close );
481
482 // Propogate the properties
483 qualify_property( context, properties, "resource" );
484 qualify_property( context, properties, "luma" );
485 qualify_property( context, properties, "luma.resource" );
486 qualify_property( context, properties, "composite.luma" );
487 qualify_property( context, properties, "producer.resource" );
488
489 // Handle in/out properties separately
490 mlt_position in = -1;
491 mlt_position out = -1;
492
493 // Get in
494 if ( mlt_properties_get( properties, "in" ) != NULL )
495 in = mlt_properties_get_position( properties, "in" );
496 // Let Kino-SMIL clipBegin be a synonym for in
497 if ( mlt_properties_get( properties, "clipBegin" ) != NULL )
498 in = mlt_properties_get_position( properties, "clipBegin" );
499 // Get out
500 if ( mlt_properties_get( properties, "out" ) != NULL )
501 out = mlt_properties_get_position( properties, "out" );
502 // Let Kino-SMIL clipEnd be a synonym for out
503 if ( mlt_properties_get( properties, "clipEnd" ) != NULL )
504 out = mlt_properties_get_position( properties, "clipEnd" );
505
506 // Remove in and out
507 mlt_properties_set( properties, "in", NULL );
508 mlt_properties_set( properties, "out", NULL );
509
510 // Inherit the properties
511 mlt_properties_inherit( MLT_SERVICE_PROPERTIES( producer ), properties );
512
513 // Attach all filters from service onto producer
514 attach_filters( producer, service );
515
516 // Add the producer to the producer map
517 if ( mlt_properties_get( properties, "id" ) != NULL )
518 mlt_properties_set_data( context->producer_map, mlt_properties_get(properties, "id"), producer, 0, NULL, NULL );
519
520 // See if the producer should be added to a playlist or multitrack
521 if ( add_producer( context, producer, in, out ) == 0 )
522 {
523 // Otherwise, set in and out on...
524 if ( in != -1 || out != -1 )
525 {
526 // Get the parent service
527 enum service_type type;
528 mlt_service parent = context_pop_service( context, &type );
529 if ( parent != NULL )
530 {
531 // Get the parent properties
532 properties = MLT_SERVICE_PROPERTIES( parent );
533
534 char *resource = mlt_properties_get( properties, "resource" );
535
536 // Put the parent producer back
537 context_push_service( context, parent, type );
538
539 // If the parent is a track or entry
540 if ( resource && ( strcmp( resource, "<entry>" ) == 0 ) )
541 {
542 mlt_properties_set_position( properties, "in", in );
543 mlt_properties_set_position( properties, "out", out );
544 }
545 else
546 {
547 // Otherwise, set in and out on producer directly
548 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
549 }
550 }
551 else
552 {
553 // Otherwise, set in and out on producer directly
554 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
555 }
556 }
557
558 // Push the producer onto the stack
559 context_push_service( context, producer, mlt_producer_type );
560 }
561
562 mlt_service_close( service );
563 }
564 }
565
566 static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
567 {
568 // Get the playlist from the stack
569 enum service_type type;
570 mlt_service service = context_pop_service( context, &type );
571 mlt_position length = 0;
572
573 if ( type == mlt_playlist_type && service != NULL )
574 {
575 // Look for the length attribute
576 for ( ; atts != NULL && *atts != NULL; atts += 2 )
577 {
578 if ( strcmp( atts[0], "length" ) == 0 )
579 {
580 length = atoll( atts[1] );
581 break;
582 }
583 }
584
585 // Append a blank to the playlist
586 mlt_playlist_blank( MLT_PLAYLIST( service ), length - 1 );
587
588 // Push the playlist back onto the stack
589 context_push_service( context, service, type );
590 }
591 else
592 {
593 fprintf( stderr, "blank without a playlist - a definite no no\n" );
594 }
595 }
596
597 static void on_start_entry( deserialise_context context, const xmlChar *name, const xmlChar **atts)
598 {
599 mlt_producer entry = NULL;
600 mlt_properties temp = mlt_properties_new( );
601
602 for ( ; atts != NULL && *atts != NULL; atts += 2 )
603 {
604 mlt_properties_set( temp, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
605
606 // Look for the producer attribute
607 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
608 {
609 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
610 if ( producer != NULL )
611 mlt_properties_set_data( temp, "producer", producer, 0, NULL, NULL );
612 }
613 }
614
615 // If we have a valid entry
616 if ( mlt_properties_get_data( temp, "producer", NULL ) != NULL )
617 {
618 mlt_playlist_clip_info info;
619 enum service_type parent_type;
620 mlt_service parent = context_pop_service( context, &parent_type );
621 mlt_producer producer = mlt_properties_get_data( temp, "producer", NULL );
622
623 if ( parent_type == mlt_playlist_type )
624 {
625 // Append the producer to the playlist
626 if ( mlt_properties_get( temp, "in" ) != NULL || mlt_properties_get( temp, "out" ) != NULL )
627 {
628 mlt_playlist_append_io( MLT_PLAYLIST( parent ), producer,
629 mlt_properties_get_position( temp, "in" ),
630 mlt_properties_get_position( temp, "out" ) );
631 }
632 else
633 {
634 mlt_playlist_append( MLT_PLAYLIST( parent ), producer );
635 }
636
637 // Handle the repeat property
638 if ( mlt_properties_get_int( temp, "repeat" ) > 0 )
639 {
640 mlt_playlist_repeat_clip( MLT_PLAYLIST( parent ),
641 mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1,
642 mlt_properties_get_int( temp, "repeat" ) );
643 }
644
645 mlt_playlist_get_clip_info( MLT_PLAYLIST( parent ), &info, mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1 );
646 entry = info.cut;
647 }
648 else
649 {
650 fprintf( stderr, "Entry not part of a playlist...\n" );
651 }
652
653 context_push_service( context, parent, parent_type );
654 }
655
656 // Push the cut onto the stack
657 context_push_service( context, MLT_PRODUCER_SERVICE( entry ), mlt_entry_type );
658
659 mlt_properties_close( temp );
660 }
661
662 static void on_end_entry( deserialise_context context, const xmlChar *name )
663 {
664 // Get the entry from the stack
665 enum service_type entry_type;
666 mlt_service entry = context_pop_service( context, &entry_type );
667
668 if ( entry == NULL && entry_type != mlt_entry_type )
669 {
670 fprintf( stderr, "Invalid state at end of entry\n" );
671 }
672 }
673
674 static void on_start_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
675 {
676 // use a dummy service to hold properties to allow arbitrary nesting
677 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
678 mlt_service_init( service, NULL );
679
680 // Push the dummy service onto the stack
681 context_push_service( context, service, mlt_entry_type );
682
683 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "resource", "<track>" );
684
685 for ( ; atts != NULL && *atts != NULL; atts += 2 )
686 {
687 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
688
689 // Look for the producer attribute
690 if ( strcmp( atts[ 0 ], "producer" ) == 0 )
691 {
692 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
693 if ( producer != NULL )
694 mlt_properties_set_data( MLT_SERVICE_PROPERTIES( service ), "producer", producer, 0, NULL, NULL );
695 }
696 }
697 }
698
699 static void on_end_track( deserialise_context context, const xmlChar *name )
700 {
701 // Get the track from the stack
702 enum service_type track_type;
703 mlt_service track = context_pop_service( context, &track_type );
704
705 if ( track != NULL && track_type == mlt_entry_type )
706 {
707 mlt_properties track_props = MLT_SERVICE_PROPERTIES( track );
708 enum service_type parent_type;
709 mlt_service parent = context_pop_service( context, &parent_type );
710 mlt_multitrack multitrack = NULL;
711
712 mlt_producer producer = mlt_properties_get_data( track_props, "producer", NULL );
713 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
714
715 if ( parent_type == mlt_tractor_type )
716 multitrack = mlt_tractor_multitrack( MLT_TRACTOR( parent ) );
717 else if ( parent_type == mlt_multitrack_type )
718 multitrack = MLT_MULTITRACK( parent );
719 else
720 fprintf( stderr, "track contained in an invalid container\n" );
721
722 if ( multitrack != NULL )
723 {
724 // Set producer i/o if specified
725 if ( mlt_properties_get( track_props, "in" ) != NULL ||
726 mlt_properties_get( track_props, "out" ) != NULL )
727 {
728 mlt_producer cut = mlt_producer_cut( MLT_PRODUCER( producer ),
729 mlt_properties_get_position( track_props, "in" ),
730 mlt_properties_get_position( track_props, "out" ) );
731 mlt_multitrack_connect( multitrack, cut, mlt_multitrack_count( multitrack ) );
732 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( cut ), track_props );
733 track_props = MLT_PRODUCER_PROPERTIES( cut );
734 mlt_producer_close( cut );
735 }
736 else
737 {
738 mlt_multitrack_connect( multitrack, producer, mlt_multitrack_count( multitrack ) );
739 }
740
741 // Set the hide state of the track producer
742 char *hide_s = mlt_properties_get( track_props, "hide" );
743 if ( hide_s != NULL )
744 {
745 if ( strcmp( hide_s, "video" ) == 0 )
746 mlt_properties_set_int( producer_props, "hide", 1 );
747 else if ( strcmp( hide_s, "audio" ) == 0 )
748 mlt_properties_set_int( producer_props, "hide", 2 );
749 else if ( strcmp( hide_s, "both" ) == 0 )
750 mlt_properties_set_int( producer_props, "hide", 3 );
751 }
752 }
753
754 if ( parent != NULL )
755 context_push_service( context, parent, parent_type );
756
757 mlt_service_close( track );
758 }
759 else
760 {
761 fprintf( stderr, "Invalid state at end of track\n" );
762 }
763 }
764
765 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
766 {
767 // use a dummy service to hold properties to allow arbitrary nesting
768 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
769 mlt_service_init( service, NULL );
770
771 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
772
773 context_push_service( context, service, mlt_dummy_filter_type );
774
775 // Set the properties
776 for ( ; atts != NULL && *atts != NULL; atts += 2 )
777 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
778 }
779
780 static void on_end_filter( deserialise_context context, const xmlChar *name )
781 {
782 enum service_type type;
783 mlt_service service = context_pop_service( context, &type );
784 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
785
786 enum service_type parent_type;
787 mlt_service parent = context_pop_service( context, &parent_type );
788
789 if ( service != NULL && type == mlt_dummy_filter_type )
790 {
791 mlt_service filter = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
792 mlt_properties filter_props = MLT_SERVICE_PROPERTIES( filter );
793
794 track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
795
796 // Propogate the properties
797 qualify_property( context, properties, "resource" );
798 qualify_property( context, properties, "luma" );
799 qualify_property( context, properties, "luma.resource" );
800 qualify_property( context, properties, "composite.luma" );
801 qualify_property( context, properties, "producer.resource" );
802 mlt_properties_inherit( filter_props, properties );
803
804 // Attach all filters from service onto filter
805 attach_filters( filter, service );
806
807 // Associate the filter with the parent
808 if ( parent != NULL )
809 {
810 if ( parent_type == mlt_tractor_type )
811 {
812 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
813 mlt_field_plant_filter( field, MLT_FILTER( filter ), mlt_properties_get_int( properties, "track" ) );
814 mlt_filter_set_in_and_out( MLT_FILTER( filter ),
815 mlt_properties_get_int( properties, "in" ),
816 mlt_properties_get_int( properties, "out" ) );
817 }
818 else
819 {
820 mlt_service_attach( parent, MLT_FILTER( filter ) );
821 }
822
823 // Put the parent back on the stack
824 context_push_service( context, parent, parent_type );
825 }
826 else
827 {
828 fprintf( stderr, "filter closed with invalid parent...\n" );
829 }
830
831 // Close the dummy filter service
832 mlt_service_close( service );
833 }
834 else
835 {
836 fprintf( stderr, "Invalid top of stack on filter close\n" );
837 }
838 }
839
840 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
841 {
842 // use a dummy service to hold properties to allow arbitrary nesting
843 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
844 mlt_service_init( service, NULL );
845
846 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
847
848 context_push_service( context, service, mlt_dummy_transition_type );
849
850 // Set the properties
851 for ( ; atts != NULL && *atts != NULL; atts += 2 )
852 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
853 }
854
855 static void on_end_transition( deserialise_context context, const xmlChar *name )
856 {
857 enum service_type type;
858 mlt_service service = context_pop_service( context, &type );
859 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
860
861 enum service_type parent_type;
862 mlt_service parent = context_pop_service( context, &parent_type );
863
864 if ( service != NULL && type == mlt_dummy_transition_type )
865 {
866 mlt_service effect = MLT_SERVICE( mlt_factory_transition(mlt_properties_get(properties,"mlt_service"), NULL ) );
867 mlt_properties effect_props = MLT_SERVICE_PROPERTIES( effect );
868
869 track_service( context->destructors, effect, (mlt_destructor) mlt_transition_close );
870
871 // Propogate the properties
872 qualify_property( context, properties, "resource" );
873 qualify_property( context, properties, "luma" );
874 qualify_property( context, properties, "luma.resource" );
875 qualify_property( context, properties, "composite.luma" );
876 qualify_property( context, properties, "producer.resource" );
877 mlt_properties_inherit( effect_props, properties );
878
879 // Attach all filters from service onto effect
880 attach_filters( effect, service );
881
882 // Associate the filter with the parent
883 if ( parent != NULL )
884 {
885 if ( parent_type == mlt_tractor_type )
886 {
887 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
888 if ( mlt_properties_get_int( properties, "a_track" ) == mlt_properties_get_int( properties, "b_track" ) )
889 mlt_properties_set_int( properties, "b_track", mlt_properties_get_int( properties, "a_track" ) + 1 );
890 mlt_field_plant_transition( field, MLT_TRANSITION( effect ),
891 mlt_properties_get_int( properties, "a_track" ),
892 mlt_properties_get_int( properties, "b_track" ) );
893 mlt_transition_set_in_and_out( MLT_TRANSITION( effect ),
894 mlt_properties_get_int( properties, "in" ),
895 mlt_properties_get_int( properties, "out" ) );
896 }
897 else
898 {
899 fprintf( stderr, "Misplaced transition - ignoring\n" );
900 }
901
902 // Put the parent back on the stack
903 context_push_service( context, parent, parent_type );
904 }
905 else
906 {
907 fprintf( stderr, "transition closed with invalid parent...\n" );
908 }
909
910 // Close the dummy filter service
911 mlt_service_close( service );
912 }
913 else
914 {
915 fprintf( stderr, "Invalid top of stack on transition close\n" );
916 }
917 }
918
919 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
920 {
921 enum service_type type;
922 mlt_service service = context_pop_service( context, &type );
923 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
924 char *value = NULL;
925
926 if ( service != NULL )
927 {
928 // Set the properties
929 for ( ; atts != NULL && *atts != NULL; atts += 2 )
930 {
931 if ( strcmp( atts[ 0 ], "name" ) == 0 )
932 context->property = strdup( atts[ 1 ] );
933 else if ( strcmp( atts[ 0 ], "value" ) == 0 )
934 value = (char*) atts[ 1 ];
935 }
936
937 if ( context->property != NULL )
938 mlt_properties_set( properties, context->property, value == NULL ? "" : value );
939
940 // Tell parser to collect any further nodes for serialisation
941 context->is_value = 1;
942
943 context_push_service( context, service, type );
944 }
945 else
946 {
947 fprintf( stderr, "Property without a service '%s'?\n", ( char * )name );
948 }
949 }
950
951 static void on_end_property( deserialise_context context, const xmlChar *name )
952 {
953 enum service_type type;
954 mlt_service service = context_pop_service( context, &type );
955 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
956
957 if ( service != NULL )
958 {
959 // Tell parser to stop building a tree
960 context->is_value = 0;
961
962 // See if there is a xml tree for the value
963 if ( context->property != NULL && context->value_doc != NULL )
964 {
965 xmlChar *value;
966 int size;
967
968 // Serialise the tree to get value
969 xmlDocDumpMemory( context->value_doc, &value, &size );
970 mlt_properties_set( properties, context->property, value );
971 xmlFree( value );
972 xmlFreeDoc( context->value_doc );
973 context->value_doc = NULL;
974 }
975
976 // Close this property handling
977 free( context->property );
978 context->property = NULL;
979
980 context_push_service( context, service, type );
981 }
982 else
983 {
984 fprintf( stderr, "Property without a service '%s'??\n", (char *)name );
985 }
986 }
987
988 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
989 {
990 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
991 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
992
993 //printf("on_start_element: %s\n", name );
994 context->branch[ context->depth ] ++;
995 context->depth ++;
996
997 // Build a tree from nodes within a property value
998 if ( context->is_value == 1 )
999 {
1000 xmlNodePtr node = xmlNewNode( NULL, name );
1001
1002 if ( context->value_doc == NULL )
1003 {
1004 // Start a new tree
1005 context->value_doc = xmlNewDoc( "1.0" );
1006 xmlDocSetRootElement( context->value_doc, node );
1007 }
1008 else
1009 {
1010 // Append child to tree
1011 xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node );
1012 }
1013 context_push_node( context, node );
1014
1015 // Set the attributes
1016 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1017 xmlSetProp( node, atts[ 0 ], atts[ 1 ] );
1018 }
1019 else if ( strcmp( name, "tractor" ) == 0 )
1020 on_start_tractor( context, name, atts );
1021 else if ( strcmp( name, "multitrack" ) == 0 )
1022 on_start_multitrack( context, name, atts );
1023 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1024 on_start_playlist( context, name, atts );
1025 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1026 on_start_producer( context, name, atts );
1027 else if ( strcmp( name, "blank" ) == 0 )
1028 on_start_blank( context, name, atts );
1029 else if ( strcmp( name, "entry" ) == 0 )
1030 on_start_entry( context, name, atts );
1031 else if ( strcmp( name, "track" ) == 0 )
1032 on_start_track( context, name, atts );
1033 else if ( strcmp( name, "filter" ) == 0 )
1034 on_start_filter( context, name, atts );
1035 else if ( strcmp( name, "transition" ) == 0 )
1036 on_start_transition( context, name, atts );
1037 else if ( strcmp( name, "property" ) == 0 )
1038 on_start_property( context, name, atts );
1039 else if ( strcmp( name, "westley" ) == 0 )
1040 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1041 mlt_properties_set( context->producer_map, ( char * )atts[ 0 ], ( char * )atts[ 1 ] );
1042 }
1043
1044 static void on_end_element( void *ctx, const xmlChar *name )
1045 {
1046 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1047 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1048
1049 //printf("on_end_element: %s\n", name );
1050 if ( context->is_value == 1 && strcmp( name, "property" ) != 0 )
1051 context_pop_node( context );
1052 else if ( strcmp( name, "multitrack" ) == 0 )
1053 on_end_multitrack( context, name );
1054 else if ( strcmp( name, "playlist" ) == 0 || strcmp( name, "seq" ) == 0 || strcmp( name, "smil" ) == 0 )
1055 on_end_playlist( context, name );
1056 else if ( strcmp( name, "track" ) == 0 )
1057 on_end_track( context, name );
1058 else if ( strcmp( name, "entry" ) == 0 )
1059 on_end_entry( context, name );
1060 else if ( strcmp( name, "tractor" ) == 0 )
1061 on_end_tractor( context, name );
1062 else if ( strcmp( name, "property" ) == 0 )
1063 on_end_property( context, name );
1064 else if ( strcmp( name, "producer" ) == 0 || strcmp( name, "video" ) == 0 )
1065 on_end_producer( context, name );
1066 else if ( strcmp( name, "filter" ) == 0 )
1067 on_end_filter( context, name );
1068 else if ( strcmp( name, "transition" ) == 0 )
1069 on_end_transition( context, name );
1070
1071 context->branch[ context->depth ] = 0;
1072 context->depth --;
1073 }
1074
1075 static void on_characters( void *ctx, const xmlChar *ch, int len )
1076 {
1077 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1078 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1079 char *value = calloc( len + 1, 1 );
1080 enum service_type type;
1081 mlt_service service = context_pop_service( context, &type );
1082 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1083
1084 if ( service != NULL )
1085 context_push_service( context, service, type );
1086
1087 value[ len ] = 0;
1088 strncpy( value, (const char*) ch, len );
1089
1090 if ( context->stack_node_size > 0 )
1091 xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value );
1092
1093 // libxml2 generates an on_characters immediately after a get_entity within
1094 // an element value, and we ignore it because it is called again during
1095 // actual substitution.
1096 else if ( context->property != NULL && context->entity_is_replace == 0 )
1097 {
1098 char *s = mlt_properties_get( properties, context->property );
1099 if ( s != NULL )
1100 {
1101 // Append new text to existing content
1102 char *new = calloc( strlen( s ) + len + 1, 1 );
1103 strcat( new, s );
1104 strcat( new, value );
1105 mlt_properties_set( properties, context->property, new );
1106 free( new );
1107 }
1108 else
1109 mlt_properties_set( properties, context->property, value );
1110 }
1111 context->entity_is_replace = 0;
1112
1113 free( value);
1114 }
1115
1116 /** Convert parameters parsed from resource into entity declarations.
1117 */
1118 static void params_to_entities( deserialise_context context )
1119 {
1120 if ( context->params != NULL )
1121 {
1122 int i;
1123
1124 // Add our params as entitiy declarations
1125 for ( i = 0; i < mlt_properties_count( context->params ); i++ )
1126 {
1127 xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i );
1128 xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY,
1129 context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, name ) );
1130 }
1131
1132 // Flag completion
1133 mlt_properties_close( context->params );
1134 context->params = NULL;
1135 }
1136 }
1137
1138 // The following 3 facilitate entity substitution in the SAX parser
1139 static void on_internal_subset( void *ctx, const xmlChar* name,
1140 const xmlChar* publicId, const xmlChar* systemId )
1141 {
1142 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1143 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1144
1145 context->publicId = publicId;
1146 context->systemId = systemId;
1147 xmlCreateIntSubset( context->entity_doc, name, publicId, systemId );
1148
1149 // Override default entities with our parameters
1150 params_to_entities( context );
1151 }
1152
1153 // TODO: Check this with Dan... I think this is for westley parameterisation
1154 // but it's breaking standard escaped entities (like &lt; etc).
1155 static void on_entity_declaration( void *ctx, const xmlChar* name, int type,
1156 const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
1157 {
1158 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1159 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1160
1161 xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content );
1162 }
1163
1164 // TODO: Check this functionality (see on_entity_declaration)
1165 static xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name )
1166 {
1167 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1168 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1169 xmlEntityPtr e = NULL;
1170
1171 // Setup for entity declarations if not ready
1172 if ( xmlGetIntSubset( context->entity_doc ) == NULL )
1173 {
1174 xmlCreateIntSubset( context->entity_doc, "westley", "", "" );
1175 context->publicId = "";
1176 context->systemId = "";
1177 }
1178
1179 // Add our parameters if not already
1180 params_to_entities( context );
1181
1182 e = xmlGetPredefinedEntity( name );
1183
1184 // Send signal to on_characters that an entity substitutin is pending
1185 if ( e == NULL )
1186 {
1187 e = xmlGetDocEntity( context->entity_doc, name );
1188 if ( e != NULL )
1189 context->entity_is_replace = 1;
1190 }
1191
1192 return e;
1193 }
1194
1195 /** Convert a hexadecimal character to its value.
1196 */
1197 static int tohex( char p )
1198 {
1199 return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10;
1200 }
1201
1202 /** Decode a url-encoded string containing hexadecimal character sequences.
1203 */
1204 static char *url_decode( char *dest, char *src )
1205 {
1206 char *p = dest;
1207
1208 while ( *src )
1209 {
1210 if ( *src == '%' )
1211 {
1212 *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) );
1213 src += 3;
1214 }
1215 else
1216 {
1217 *p ++ = *src ++;
1218 }
1219 }
1220
1221 *p = *src;
1222 return dest;
1223 }
1224
1225 /** Extract the filename from a URL attaching parameters to a properties list.
1226 */
1227 static void parse_url( mlt_properties properties, char *url )
1228 {
1229 int i;
1230 int n = strlen( url );
1231 char *name = NULL;
1232 char *value = NULL;
1233
1234 for ( i = 0; i < n; i++ )
1235 {
1236 switch ( url[ i ] )
1237 {
1238 case '?':
1239 url[ i++ ] = '\0';
1240 name = &url[ i ];
1241 break;
1242
1243 case ':':
1244 case '=':
1245 url[ i++ ] = '\0';
1246 value = &url[ i ];
1247 break;
1248
1249 case '&':
1250 url[ i++ ] = '\0';
1251 if ( name != NULL && value != NULL )
1252 mlt_properties_set( properties, name, value );
1253 name = &url[ i ];
1254 value = NULL;
1255 break;
1256 }
1257 }
1258 if ( name != NULL && value != NULL )
1259 mlt_properties_set( properties, name, value );
1260 }
1261
1262 // Quick workaround to avoid unecessary libxml2 warnings
1263 static int file_exists( char *file )
1264 {
1265 char *name = strdup( file );
1266 int exists = 0;
1267 if ( name != NULL && strchr( name, '?' ) )
1268 *( strchr( name, '?' ) ) = '\0';
1269 if ( name != NULL )
1270 {
1271 FILE *f = fopen( name, "r" );
1272 exists = f != NULL;
1273 if ( exists ) fclose( f );
1274 }
1275 free( name );
1276 return exists;
1277 }
1278
1279 mlt_producer producer_westley_init( int info, char *data )
1280 {
1281 xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
1282 struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
1283 mlt_properties properties = NULL;
1284 int i = 0;
1285 struct _xmlParserCtxt *xmlcontext;
1286 int well_formed = 0;
1287 char *filename = NULL;
1288
1289 if ( data == NULL || !strcmp( data, "" ) || ( info == 0 && !file_exists( data ) ) )
1290 return NULL;
1291
1292 context = calloc( 1, sizeof( struct deserialise_context_s ) );
1293 if ( context == NULL )
1294 return NULL;
1295
1296 context->producer_map = mlt_properties_new();
1297 context->destructors = mlt_properties_new();
1298 context->params = mlt_properties_new();
1299
1300 // Decode URL and parse parameters
1301 mlt_properties_set( context->producer_map, "root", "" );
1302 if ( info == 0 )
1303 {
1304 filename = strdup( data );
1305 parse_url( context->params, url_decode( filename, data ) );
1306
1307 // We need the directory prefix which was used for the westley
1308 if ( strchr( filename, '/' ) )
1309 {
1310 char *root = NULL;
1311 mlt_properties_set( context->producer_map, "root", filename );
1312 root = mlt_properties_get( context->producer_map, "root" );
1313 *( strrchr( root, '/' ) ) = '\0';
1314
1315 // If we don't have an absolute path here, we're heading for disaster...
1316 if ( root[ 0 ] != '/' )
1317 {
1318 char *cwd = getcwd( NULL, 0 );
1319 char *real = malloc( strlen( cwd ) + strlen( root ) + 2 );
1320 sprintf( real, "%s/%s", cwd, root );
1321 mlt_properties_set( context->producer_map, "root", real );
1322 free( real );
1323 free( cwd );
1324 }
1325 }
1326 }
1327
1328 // We need to track the number of registered filters
1329 mlt_properties_set_int( context->destructors, "registered", 0 );
1330
1331 // Setup SAX callbacks
1332 sax->startElement = on_start_element;
1333 sax->endElement = on_end_element;
1334 sax->characters = on_characters;
1335 sax->cdataBlock = on_characters;
1336 sax->internalSubset = on_internal_subset;
1337 sax->entityDecl = on_entity_declaration;
1338 sax->getEntity = on_get_entity;
1339
1340 // Setup libxml2 SAX parsing
1341 xmlInitParser();
1342 xmlSubstituteEntitiesDefault( 1 );
1343 // This is used to facilitate entity substitution in the SAX parser
1344 context->entity_doc = xmlNewDoc( "1.0" );
1345 if ( info == 0 )
1346 xmlcontext = xmlCreateFileParserCtxt( filename );
1347 else
1348 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1349
1350 // Invalid context - clean up and return NULL
1351 if ( xmlcontext == NULL )
1352 {
1353 mlt_properties_close( context->producer_map );
1354 mlt_properties_close( context->destructors );
1355 mlt_properties_close( context->params );
1356 free( context );
1357 free( sax );
1358 free( filename );
1359 return NULL;
1360 }
1361
1362 xmlcontext->sax = sax;
1363 xmlcontext->_private = ( void* )context;
1364
1365 // Parse
1366 xmlParseDocument( xmlcontext );
1367 well_formed = xmlcontext->wellFormed;
1368
1369 // Cleanup after parsing
1370 xmlFreeDoc( context->entity_doc );
1371 free( sax );
1372 xmlcontext->sax = NULL;
1373 xmlcontext->_private = NULL;
1374 xmlFreeParserCtxt( xmlcontext );
1375 xmlMemoryDump( ); // for debugging
1376
1377 // Get the last producer on the stack
1378 enum service_type type;
1379 mlt_service service = context_pop_service( context, &type );
1380 if ( well_formed && service != NULL )
1381 {
1382 // Verify it is a producer service (mlt_type="mlt_producer")
1383 // (producer, playlist, multitrack)
1384 char *type = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "mlt_type" );
1385 if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 && strcmp( type, "producer" ) != 0 ) )
1386 service = NULL;
1387 }
1388
1389 #ifdef DEBUG
1390 xmlDocPtr doc = westley_make_doc( service );
1391 xmlDocFormatDump( stdout, doc, 1 );
1392 xmlFreeDoc( doc );
1393 service = NULL;
1394 #endif
1395
1396 if ( well_formed && service != NULL )
1397 {
1398 char *title = mlt_properties_get( context->producer_map, "title" );
1399
1400 // Need the complete producer list for various reasons
1401 properties = context->destructors;
1402
1403 // Now make sure we don't have a reference to the service in the properties
1404 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
1405 {
1406 char *name = mlt_properties_get_name( properties, i );
1407 if ( mlt_properties_get_data( properties, name, NULL ) == service )
1408 {
1409 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
1410 break;
1411 }
1412 }
1413
1414 // We are done referencing destructor property list
1415 // Set this var to service properties for convenience
1416 properties = MLT_SERVICE_PROPERTIES( service );
1417
1418 // Assign the title
1419 mlt_properties_set( properties, "title", title );
1420
1421 // Optimise for overlapping producers
1422 mlt_producer_optimise( MLT_PRODUCER( service ) );
1423
1424 // Handle deep copies
1425 if ( getenv( "MLT_WESTLEY_DEEP" ) == NULL )
1426 {
1427 // Now assign additional properties
1428 if ( info == 0 )
1429 mlt_properties_set( properties, "resource", data );
1430
1431 // This tells consumer_westley not to deep copy
1432 mlt_properties_set( properties, "westley", "was here" );
1433 }
1434 else
1435 {
1436 // Allow the project to be edited
1437 mlt_properties_set( properties, "_westley", "was here" );
1438 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
1439 }
1440 }
1441 else
1442 {
1443 // Return null if not well formed
1444 service = NULL;
1445 }
1446
1447 // Clean up
1448 mlt_properties_close( context->producer_map );
1449 if ( context->params != NULL )
1450 mlt_properties_close( context->params );
1451 mlt_properties_close( context->destructors );
1452 free( context );
1453 free( filename );
1454
1455 return MLT_PRODUCER( service );
1456 }
my melted branch