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avformat/factory.c, jackrack/jack_rack.c, jackrack/plugin_settings.c, vmfx/filter_chr...
[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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 // TODO: destroy unreferenced producers (they are currently destroyed
22 // when the returned producer is closed).
23
24 #include "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 #define _x (xmlChar*)
40 #define _s (char*)
41
42 #undef DEBUG
43 #ifdef DEBUG
44 extern xmlDocPtr westley_make_doc( mlt_service service );
45 #endif
46
47 enum service_type
48 {
49 mlt_invalid_type,
50 mlt_unknown_type,
51 mlt_producer_type,
52 mlt_playlist_type,
53 mlt_entry_type,
54 mlt_tractor_type,
55 mlt_multitrack_type,
56 mlt_filter_type,
57 mlt_transition_type,
58 mlt_consumer_type,
59 mlt_field_type,
60 mlt_services_type,
61 mlt_dummy_filter_type,
62 mlt_dummy_transition_type,
63 mlt_dummy_producer_type,
64 };
65
66 struct deserialise_context_s
67 {
68 enum service_type stack_types[ STACK_SIZE ];
69 mlt_service stack_service[ STACK_SIZE ];
70 int stack_service_size;
71 mlt_properties producer_map;
72 mlt_properties destructors;
73 char *property;
74 int is_value;
75 xmlDocPtr value_doc;
76 xmlNodePtr stack_node[ STACK_SIZE ];
77 int stack_node_size;
78 xmlDocPtr entity_doc;
79 int entity_is_replace;
80 int depth;
81 int branch[ STACK_SIZE ];
82 const xmlChar *publicId;
83 const xmlChar *systemId;
84 mlt_properties params;
85 };
86 typedef struct deserialise_context_s *deserialise_context;
87
88 /** Convert the numerical current branch address to a dot-delimited string.
89 */
90 static char *serialise_branch( deserialise_context this, char *s )
91 {
92 int i;
93
94 s[0] = 0;
95 for ( i = 0; i < this->depth; i++ )
96 {
97 int len = strlen( s );
98 snprintf( s + len, BRANCH_SIG_LEN - len, "%d.", this->branch[ i ] );
99 }
100 return s;
101 }
102
103 /** Push a service.
104 */
105
106 static int context_push_service( deserialise_context this, mlt_service that, enum service_type type )
107 {
108 int ret = this->stack_service_size >= STACK_SIZE - 1;
109 if ( ret == 0 )
110 {
111 this->stack_service[ this->stack_service_size ] = that;
112 this->stack_types[ this->stack_service_size++ ] = type;
113
114 // Record the tree branch on which this service lives
115 if ( that != NULL && mlt_properties_get( MLT_SERVICE_PROPERTIES( that ), "_westley_branch" ) == NULL )
116 {
117 char s[ BRANCH_SIG_LEN ];
118 mlt_properties_set( MLT_SERVICE_PROPERTIES( that ), "_westley_branch", serialise_branch( this, s ) );
119 }
120 }
121 return ret;
122 }
123
124 /** Pop a service.
125 */
126
127 static mlt_service context_pop_service( deserialise_context this, enum service_type *type )
128 {
129 mlt_service result = NULL;
130 if ( this->stack_service_size > 0 )
131 {
132 result = this->stack_service[ -- this->stack_service_size ];
133 if ( type != NULL )
134 *type = this->stack_types[ this->stack_service_size ];
135 }
136 return result;
137 }
138
139 /** Push a node.
140 */
141
142 static int context_push_node( deserialise_context this, xmlNodePtr node )
143 {
144 int ret = this->stack_node_size >= STACK_SIZE - 1;
145 if ( ret == 0 )
146 this->stack_node[ this->stack_node_size ++ ] = node;
147 return ret;
148 }
149
150 /** Pop a node.
151 */
152
153 static xmlNodePtr context_pop_node( deserialise_context this )
154 {
155 xmlNodePtr result = NULL;
156 if ( this->stack_node_size > 0 )
157 result = this->stack_node[ -- this->stack_node_size ];
158 return result;
159 }
160
161
162 // Set the destructor on a new service
163 static void track_service( mlt_properties properties, void *service, mlt_destructor destructor )
164 {
165 int registered = mlt_properties_get_int( properties, "registered" );
166 char *key = mlt_properties_get( properties, "registered" );
167 mlt_properties_set_data( properties, key, service, 0, destructor, NULL );
168 mlt_properties_set_int( properties, "registered", ++ registered );
169 }
170
171
172 // Prepend the property value with the document root
173 static inline void qualify_property( deserialise_context context, mlt_properties properties, char *name )
174 {
175 char *resource = mlt_properties_get( properties, name );
176 if ( resource != NULL )
177 {
178 // Qualify file name properties
179 char *root = mlt_properties_get( context->producer_map, "root" );
180 if ( root != NULL && strcmp( root, "" ) )
181 {
182 char *full_resource = malloc( strlen( root ) + strlen( resource ) + 2 );
183 if ( resource[ 0 ] != '/' && strchr( resource, ':' ) == NULL )
184 {
185 strcpy( full_resource, root );
186 strcat( full_resource, "/" );
187 strcat( full_resource, resource );
188 }
189 else
190 {
191 strcpy( full_resource, resource );
192 }
193 mlt_properties_set( properties, name, full_resource );
194 free( full_resource );
195 }
196 }
197 }
198
199
200 /** This function adds a producer to a playlist or multitrack when
201 there is no entry or track element.
202 */
203
204 static int add_producer( deserialise_context context, mlt_service service, mlt_position in, mlt_position out )
205 {
206 // Return value (0 = service remains top of stack, 1 means it can be removed)
207 int result = 0;
208
209 // Get the parent producer
210 enum service_type type;
211 mlt_service container = context_pop_service( context, &type );
212 int contained = 0;
213
214 if ( service != NULL && container != NULL )
215 {
216 char *container_branch = mlt_properties_get( MLT_SERVICE_PROPERTIES( container ), "_westley_branch" );
217 char *service_branch = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "_westley_branch" );
218 contained = !strncmp( container_branch, service_branch, strlen( container_branch ) );
219 }
220
221 if ( contained )
222 {
223 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
224 char *hide_s = mlt_properties_get( properties, "hide" );
225
226 // Indicate that this service is no longer top of stack
227 result = 1;
228
229 switch( type )
230 {
231 case mlt_tractor_type:
232 {
233 mlt_multitrack multitrack = mlt_tractor_multitrack( MLT_TRACTOR( container ) );
234 mlt_multitrack_connect( multitrack, MLT_PRODUCER( service ), mlt_multitrack_count( multitrack ) );
235 }
236 break;
237 case mlt_multitrack_type:
238 {
239 mlt_multitrack_connect( MLT_MULTITRACK( container ),
240 MLT_PRODUCER( service ),
241 mlt_multitrack_count( MLT_MULTITRACK( container ) ) );
242 }
243 break;
244 case mlt_playlist_type:
245 {
246 mlt_playlist_append_io( MLT_PLAYLIST( container ), MLT_PRODUCER( service ), in, out );
247 }
248 break;
249 default:
250 result = 0;
251 fprintf( stderr, "Producer defined inside something that isn't a container\n" );
252 break;
253 };
254
255 // Set the hide state of the track producer
256 if ( hide_s != NULL )
257 {
258 if ( strcmp( hide_s, "video" ) == 0 )
259 mlt_properties_set_int( properties, "hide", 1 );
260 else if ( strcmp( hide_s, "audio" ) == 0 )
261 mlt_properties_set_int( properties, "hide", 2 );
262 else if ( strcmp( hide_s, "both" ) == 0 )
263 mlt_properties_set_int( properties, "hide", 3 );
264 }
265 }
266
267 // Put the parent producer back
268 if ( container != NULL )
269 context_push_service( context, container, type );
270
271 return result;
272 }
273
274 /** Attach filters defined on that to this.
275 */
276
277 static void attach_filters( mlt_service this, mlt_service that )
278 {
279 if ( that != NULL )
280 {
281 int i = 0;
282 mlt_filter filter = NULL;
283 for ( i = 0; ( filter = mlt_service_filter( that, i ) ) != NULL; i ++ )
284 {
285 mlt_service_attach( this, filter );
286 attach_filters( MLT_FILTER_SERVICE( filter ), MLT_FILTER_SERVICE( filter ) );
287 }
288 }
289 }
290
291 static void on_start_tractor( deserialise_context context, const xmlChar *name, const xmlChar **atts)
292 {
293 mlt_tractor tractor = mlt_tractor_new( );
294 mlt_service service = MLT_TRACTOR_SERVICE( tractor );
295 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
296
297 track_service( context->destructors, service, (mlt_destructor) mlt_tractor_close );
298
299 for ( ; atts != NULL && *atts != NULL; atts += 2 )
300 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
301
302 mlt_properties_set_int( MLT_TRACTOR_PROPERTIES( tractor ), "global_feed", 1 );
303
304 if ( mlt_properties_get( properties, "id" ) != NULL )
305 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
306
307 context_push_service( context, service, mlt_tractor_type );
308 }
309
310 static void on_end_tractor( deserialise_context context, const xmlChar *name )
311 {
312 // Get the tractor
313 enum service_type type;
314 mlt_service tractor = context_pop_service( context, &type );
315
316 if ( tractor != NULL && type == mlt_tractor_type )
317 {
318 // See if the tractor should be added to a playlist or multitrack
319 if ( add_producer( context, tractor, 0, mlt_producer_get_out( MLT_PRODUCER( tractor ) ) ) == 0 )
320 context_push_service( context, tractor, type );
321 }
322 else
323 {
324 fprintf( stderr, "Invalid state for tractor\n" );
325 }
326 }
327
328 static void on_start_multitrack( deserialise_context context, const xmlChar *name, const xmlChar **atts)
329 {
330 enum service_type type;
331 mlt_service parent = context_pop_service( context, &type );
332
333 // If we don't have a parent, then create one now, providing we're in a state where we can
334 if ( parent == NULL || ( type == mlt_playlist_type || type == mlt_multitrack_type ) )
335 {
336 mlt_tractor tractor = NULL;
337 // Push the parent back
338 if ( parent != NULL )
339 context_push_service( context, parent, type );
340
341 // Create a tractor to contain the multitrack
342 tractor = mlt_tractor_new( );
343 parent = MLT_TRACTOR_SERVICE( tractor );
344 track_service( context->destructors, parent, (mlt_destructor) mlt_tractor_close );
345 type = mlt_tractor_type;
346
347 // Flag it as a synthesised tractor for clean up later
348 mlt_properties_set_int( MLT_SERVICE_PROPERTIES( parent ), "fezzik_synth", 1 );
349 }
350
351 if ( type == mlt_tractor_type )
352 {
353 mlt_service service = MLT_SERVICE( mlt_tractor_multitrack( MLT_TRACTOR( parent ) ) );
354 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
355 for ( ; atts != NULL && *atts != NULL; atts += 2 )
356 mlt_properties_set( properties, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
357
358 if ( mlt_properties_get( properties, "id" ) != NULL )
359 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties,"id" ), service, 0, NULL, NULL );
360
361 context_push_service( context, parent, type );
362 context_push_service( context, service, mlt_multitrack_type );
363 }
364 else
365 {
366 fprintf( stderr, "Invalid multitrack position\n" );
367 }
368 }
369
370 static void on_end_multitrack( deserialise_context context, const xmlChar *name )
371 {
372 // Get the multitrack from the stack
373 enum service_type type;
374 mlt_service service = context_pop_service( context, &type );
375
376 if ( service == NULL || type != mlt_multitrack_type )
377 fprintf( stderr, "End multitrack in the wrong state...\n" );
378 }
379
380 static void on_start_playlist( deserialise_context context, const xmlChar *name, const xmlChar **atts)
381 {
382 mlt_playlist playlist = mlt_playlist_init( );
383 mlt_service service = MLT_PLAYLIST_SERVICE( playlist );
384 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
385
386 track_service( context->destructors, service, (mlt_destructor) mlt_playlist_close );
387
388 for ( ; atts != NULL && *atts != NULL; atts += 2 )
389 {
390 mlt_properties_set( properties, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
391
392 // Out will be overwritten later as we append, so we need to save it
393 if ( xmlStrcmp( atts[ 0 ], _x("out") ) == 0 )
394 mlt_properties_set( properties, "_westley.out", ( char* )atts[ 1 ] );
395 }
396
397 if ( mlt_properties_get( properties, "id" ) != NULL )
398 mlt_properties_set_data( context->producer_map, mlt_properties_get( properties, "id" ), service, 0, NULL, NULL );
399
400 context_push_service( context, service, mlt_playlist_type );
401 }
402
403 static void on_end_playlist( deserialise_context context, const xmlChar *name )
404 {
405 // Get the playlist from the stack
406 enum service_type type;
407 mlt_service service = context_pop_service( context, &type );
408
409 if ( service != NULL && type == mlt_playlist_type )
410 {
411 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
412 mlt_position in = mlt_properties_get_position( properties, "in" );
413 mlt_position out = mlt_properties_get_position( properties, "out" );
414
415 // See if the playlist should be added to a playlist or multitrack
416 if ( add_producer( context, service, in, out ) == 0 )
417 context_push_service( context, service, type );
418 }
419 else
420 {
421 fprintf( stderr, "Invalid state of playlist end\n" );
422 }
423 }
424
425 static void on_start_producer( deserialise_context context, const xmlChar *name, const xmlChar **atts)
426 {
427 // use a dummy service to hold properties to allow arbitrary nesting
428 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
429 mlt_service_init( service, NULL );
430
431 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
432
433 context_push_service( context, service, mlt_dummy_producer_type );
434
435 for ( ; atts != NULL && *atts != NULL; atts += 2 )
436 mlt_properties_set( properties, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
437 }
438
439 // Parse a SMIL clock value (as produced by Kino 0.9.1) and return position in frames
440 static mlt_position parse_clock_value( char *value, double fps )
441 {
442 // This implementation expects a fully specified clock value - no optional
443 // parts (e.g. 1:05)
444 char *pos, *copy = strdup( value );
445 int hh, mm, ss, ms;
446 mlt_position result = -1;
447
448 value = copy;
449 pos = strchr( value, ':' );
450 if ( !pos )
451 return result;
452 *pos = '\0';
453 hh = atoi( value );
454 value = pos + 1;
455
456 pos = strchr( value, ':' );
457 if ( !pos )
458 return result;
459 *pos = '\0';
460 mm = atoi( value );
461 value = pos + 1;
462
463 pos = strchr( value, '.' );
464 if ( !pos )
465 return result;
466 *pos = '\0';
467 ss = atoi( value );
468 value = pos + 1;
469
470 ms = atoi( value );
471 free( copy );
472 result = ( fps * ( ( (hh * 3600) + (mm * 60) + ss ) * 1000 + ms ) / 1000 + 0.5 );
473
474 return result;
475 }
476
477 static void on_end_producer( deserialise_context context, const xmlChar *name )
478 {
479 enum service_type type;
480 mlt_service service = context_pop_service( context, &type );
481 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
482
483 if ( service != NULL && type == mlt_dummy_producer_type )
484 {
485 mlt_service producer = NULL;
486
487 qualify_property( context, properties, "resource" );
488 char *resource = mlt_properties_get( properties, "resource" );
489
490 // Let Kino-SMIL src be a synonym for resource
491 if ( resource == NULL )
492 {
493 qualify_property( context, properties, "src" );
494 resource = mlt_properties_get( properties, "src" );
495 }
496
497 // Instantiate the producer
498 if ( mlt_properties_get( properties, "mlt_service" ) != NULL )
499 {
500 char temp[ 1024 ];
501 strncpy( temp, mlt_properties_get( properties, "mlt_service" ), 1024 );
502 if ( resource != NULL )
503 {
504 strcat( temp, ":" );
505 strncat( temp, resource, 1023 - strlen( temp ) );
506 }
507 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", temp ) );
508 }
509
510 // Just in case the plugin requested doesn't exist...
511 if ( producer == NULL && resource != NULL )
512 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", resource ) );
513
514 if ( producer == NULL )
515 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", "+INVALID.txt" ) );
516
517 if ( producer == NULL )
518 producer = MLT_SERVICE( mlt_factory_producer( "fezzik", "colour:red" ) );
519
520 // Track this producer
521 track_service( context->destructors, producer, (mlt_destructor) mlt_producer_close );
522
523 // Propogate the properties
524 qualify_property( context, properties, "resource" );
525 qualify_property( context, properties, "luma" );
526 qualify_property( context, properties, "luma.resource" );
527 qualify_property( context, properties, "composite.luma" );
528 qualify_property( context, properties, "producer.resource" );
529
530 // Handle in/out properties separately
531 mlt_position in = -1;
532 mlt_position out = -1;
533
534 // Get in
535 if ( mlt_properties_get( properties, "in" ) != NULL )
536 in = mlt_properties_get_position( properties, "in" );
537 // Let Kino-SMIL clipBegin be a synonym for in
538 if ( mlt_properties_get( properties, "clipBegin" ) != NULL )
539 {
540 if ( strchr( mlt_properties_get( properties, "clipBegin" ), ':' ) )
541 // Parse clock value
542 in = parse_clock_value( mlt_properties_get( properties, "clipBegin" ),
543 mlt_properties_get_double( mlt_producer_properties( MLT_PRODUCER( producer ) ), "fps" ) );
544 else
545 // Parse frames value
546 in = mlt_properties_get_position( properties, "clipBegin" );
547 }
548 // Get out
549 if ( mlt_properties_get( properties, "out" ) != NULL )
550 out = mlt_properties_get_position( properties, "out" );
551 // Let Kino-SMIL clipEnd be a synonym for out
552 if ( mlt_properties_get( properties, "clipEnd" ) != NULL )
553 {
554 if ( strchr( mlt_properties_get( properties, "clipEnd" ), ':' ) )
555 // Parse clock value
556 out = parse_clock_value( mlt_properties_get( properties, "clipEnd" ),
557 mlt_properties_get_double( mlt_producer_properties( MLT_PRODUCER( producer ) ), "fps" ) );
558 else
559 // Parse frames value
560 out = mlt_properties_get_position( properties, "clipEnd" );
561 }
562 // Remove in and out
563 mlt_properties_set( properties, "in", NULL );
564 mlt_properties_set( properties, "out", NULL );
565
566 // Inherit the properties
567 mlt_properties_inherit( MLT_SERVICE_PROPERTIES( producer ), properties );
568
569 // Attach all filters from service onto producer
570 attach_filters( producer, service );
571
572 // Add the producer to the producer map
573 if ( mlt_properties_get( properties, "id" ) != NULL )
574 mlt_properties_set_data( context->producer_map, mlt_properties_get(properties, "id"), producer, 0, NULL, NULL );
575
576 // See if the producer should be added to a playlist or multitrack
577 if ( add_producer( context, producer, in, out ) == 0 )
578 {
579 // Otherwise, set in and out on...
580 if ( in != -1 || out != -1 )
581 {
582 // Get the parent service
583 enum service_type type;
584 mlt_service parent = context_pop_service( context, &type );
585 if ( parent != NULL )
586 {
587 // Get the parent properties
588 properties = MLT_SERVICE_PROPERTIES( parent );
589
590 char *resource = mlt_properties_get( properties, "resource" );
591
592 // Put the parent producer back
593 context_push_service( context, parent, type );
594
595 // If the parent is a track or entry
596 if ( resource && ( strcmp( resource, "<entry>" ) == 0 ) )
597 {
598 mlt_properties_set_position( properties, "in", in );
599 mlt_properties_set_position( properties, "out", out );
600 }
601 else
602 {
603 // Otherwise, set in and out on producer directly
604 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
605 }
606 }
607 else
608 {
609 // Otherwise, set in and out on producer directly
610 mlt_producer_set_in_and_out( MLT_PRODUCER( producer ), in, out );
611 }
612 }
613
614 // Push the producer onto the stack
615 context_push_service( context, producer, mlt_producer_type );
616 }
617
618 mlt_service_close( service );
619 }
620 }
621
622 static void on_start_blank( deserialise_context context, const xmlChar *name, const xmlChar **atts)
623 {
624 // Get the playlist from the stack
625 enum service_type type;
626 mlt_service service = context_pop_service( context, &type );
627 mlt_position length = 0;
628
629 if ( type == mlt_playlist_type && service != NULL )
630 {
631 // Look for the length attribute
632 for ( ; atts != NULL && *atts != NULL; atts += 2 )
633 {
634 if ( xmlStrcmp( atts[0], _x("length") ) == 0 )
635 {
636 length = atoll( _s(atts[1]) );
637 break;
638 }
639 }
640
641 // Append a blank to the playlist
642 mlt_playlist_blank( MLT_PLAYLIST( service ), length - 1 );
643
644 // Push the playlist back onto the stack
645 context_push_service( context, service, type );
646 }
647 else
648 {
649 fprintf( stderr, "blank without a playlist - a definite no no\n" );
650 }
651 }
652
653 static void on_start_entry( deserialise_context context, const xmlChar *name, const xmlChar **atts)
654 {
655 mlt_producer entry = NULL;
656 mlt_properties temp = mlt_properties_new( );
657
658 for ( ; atts != NULL && *atts != NULL; atts += 2 )
659 {
660 mlt_properties_set( temp, (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
661
662 // Look for the producer attribute
663 if ( xmlStrcmp( atts[ 0 ], _x("producer") ) == 0 )
664 {
665 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
666 if ( producer != NULL )
667 mlt_properties_set_data( temp, "producer", producer, 0, NULL, NULL );
668 }
669 }
670
671 // If we have a valid entry
672 if ( mlt_properties_get_data( temp, "producer", NULL ) != NULL )
673 {
674 mlt_playlist_clip_info info;
675 enum service_type parent_type = invalid_type;
676 mlt_service parent = context_pop_service( context, &parent_type );
677 mlt_producer producer = mlt_properties_get_data( temp, "producer", NULL );
678
679 if ( parent_type == mlt_playlist_type )
680 {
681 // Append the producer to the playlist
682 if ( mlt_properties_get( temp, "in" ) != NULL || mlt_properties_get( temp, "out" ) != NULL )
683 {
684 mlt_playlist_append_io( MLT_PLAYLIST( parent ), producer,
685 mlt_properties_get_position( temp, "in" ),
686 mlt_properties_get_position( temp, "out" ) );
687 }
688 else
689 {
690 mlt_playlist_append( MLT_PLAYLIST( parent ), producer );
691 }
692
693 // Handle the repeat property
694 if ( mlt_properties_get_int( temp, "repeat" ) > 0 )
695 {
696 mlt_playlist_repeat_clip( MLT_PLAYLIST( parent ),
697 mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1,
698 mlt_properties_get_int( temp, "repeat" ) );
699 }
700
701 mlt_playlist_get_clip_info( MLT_PLAYLIST( parent ), &info, mlt_playlist_count( MLT_PLAYLIST( parent ) ) - 1 );
702 entry = info.cut;
703 }
704 else
705 {
706 fprintf( stderr, "Entry not part of a playlist...\n" );
707 }
708
709 context_push_service( context, parent, parent_type );
710 }
711
712 // Push the cut onto the stack
713 context_push_service( context, MLT_PRODUCER_SERVICE( entry ), mlt_entry_type );
714
715 mlt_properties_close( temp );
716 }
717
718 static void on_end_entry( deserialise_context context, const xmlChar *name )
719 {
720 // Get the entry from the stack
721 enum service_type entry_type = invalid_type;
722 mlt_service entry = context_pop_service( context, &entry_type );
723
724 if ( entry == NULL && entry_type != mlt_entry_type )
725 {
726 fprintf( stderr, "Invalid state at end of entry\n" );
727 }
728 }
729
730 static void on_start_track( deserialise_context context, const xmlChar *name, const xmlChar **atts)
731 {
732 // use a dummy service to hold properties to allow arbitrary nesting
733 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
734 mlt_service_init( service, NULL );
735
736 // Push the dummy service onto the stack
737 context_push_service( context, service, mlt_entry_type );
738
739 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), "resource", "<track>" );
740
741 for ( ; atts != NULL && *atts != NULL; atts += 2 )
742 {
743 mlt_properties_set( MLT_SERVICE_PROPERTIES( service ), (char*) atts[0], atts[1] == NULL ? "" : (char*) atts[1] );
744
745 // Look for the producer attribute
746 if ( xmlStrcmp( atts[ 0 ], _x("producer") ) == 0 )
747 {
748 mlt_producer producer = mlt_properties_get_data( context->producer_map, (char*) atts[1], NULL );
749 if ( producer != NULL )
750 mlt_properties_set_data( MLT_SERVICE_PROPERTIES( service ), "producer", producer, 0, NULL, NULL );
751 }
752 }
753 }
754
755 static void on_end_track( deserialise_context context, const xmlChar *name )
756 {
757 // Get the track from the stack
758 enum service_type track_type;
759 mlt_service track = context_pop_service( context, &track_type );
760
761 if ( track != NULL && track_type == mlt_entry_type )
762 {
763 mlt_properties track_props = MLT_SERVICE_PROPERTIES( track );
764 enum service_type parent_type = invalid_type;
765 mlt_service parent = context_pop_service( context, &parent_type );
766 mlt_multitrack multitrack = NULL;
767
768 mlt_producer producer = mlt_properties_get_data( track_props, "producer", NULL );
769 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
770
771 if ( parent_type == mlt_tractor_type )
772 multitrack = mlt_tractor_multitrack( MLT_TRACTOR( parent ) );
773 else if ( parent_type == mlt_multitrack_type )
774 multitrack = MLT_MULTITRACK( parent );
775 else
776 fprintf( stderr, "track contained in an invalid container\n" );
777
778 if ( multitrack != NULL )
779 {
780 // Set producer i/o if specified
781 if ( mlt_properties_get( track_props, "in" ) != NULL ||
782 mlt_properties_get( track_props, "out" ) != NULL )
783 {
784 mlt_producer cut = mlt_producer_cut( MLT_PRODUCER( producer ),
785 mlt_properties_get_position( track_props, "in" ),
786 mlt_properties_get_position( track_props, "out" ) );
787 mlt_multitrack_connect( multitrack, cut, mlt_multitrack_count( multitrack ) );
788 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( cut ), track_props );
789 track_props = MLT_PRODUCER_PROPERTIES( cut );
790 mlt_producer_close( cut );
791 }
792 else
793 {
794 mlt_multitrack_connect( multitrack, producer, mlt_multitrack_count( multitrack ) );
795 }
796
797 // Set the hide state of the track producer
798 char *hide_s = mlt_properties_get( track_props, "hide" );
799 if ( hide_s != NULL )
800 {
801 if ( strcmp( hide_s, "video" ) == 0 )
802 mlt_properties_set_int( producer_props, "hide", 1 );
803 else if ( strcmp( hide_s, "audio" ) == 0 )
804 mlt_properties_set_int( producer_props, "hide", 2 );
805 else if ( strcmp( hide_s, "both" ) == 0 )
806 mlt_properties_set_int( producer_props, "hide", 3 );
807 }
808 }
809
810 if ( parent != NULL )
811 context_push_service( context, parent, parent_type );
812
813 mlt_service_close( track );
814 }
815 else
816 {
817 fprintf( stderr, "Invalid state at end of track\n" );
818 }
819 }
820
821 static void on_start_filter( deserialise_context context, const xmlChar *name, const xmlChar **atts)
822 {
823 // use a dummy service to hold properties to allow arbitrary nesting
824 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
825 mlt_service_init( service, NULL );
826
827 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
828
829 context_push_service( context, service, mlt_dummy_filter_type );
830
831 // Set the properties
832 for ( ; atts != NULL && *atts != NULL; atts += 2 )
833 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
834 }
835
836 static void on_end_filter( deserialise_context context, const xmlChar *name )
837 {
838 enum service_type type;
839 mlt_service service = context_pop_service( context, &type );
840 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
841
842 enum service_type parent_type = invalid_type;
843 mlt_service parent = context_pop_service( context, &parent_type );
844
845 if ( service != NULL && type == mlt_dummy_filter_type )
846 {
847 mlt_service filter = MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties, "mlt_service" ), NULL ) );
848 mlt_properties filter_props = MLT_SERVICE_PROPERTIES( filter );
849
850 track_service( context->destructors, filter, (mlt_destructor) mlt_filter_close );
851
852 // Propogate the properties
853 qualify_property( context, properties, "resource" );
854 qualify_property( context, properties, "luma" );
855 qualify_property( context, properties, "luma.resource" );
856 qualify_property( context, properties, "composite.luma" );
857 qualify_property( context, properties, "producer.resource" );
858 mlt_properties_inherit( filter_props, properties );
859
860 // Attach all filters from service onto filter
861 attach_filters( filter, service );
862
863 // Associate the filter with the parent
864 if ( parent != NULL )
865 {
866 if ( parent_type == mlt_tractor_type )
867 {
868 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
869 mlt_field_plant_filter( field, MLT_FILTER( filter ), mlt_properties_get_int( properties, "track" ) );
870 mlt_filter_set_in_and_out( MLT_FILTER( filter ),
871 mlt_properties_get_int( properties, "in" ),
872 mlt_properties_get_int( properties, "out" ) );
873 }
874 else
875 {
876 mlt_service_attach( parent, MLT_FILTER( filter ) );
877 }
878
879 // Put the parent back on the stack
880 context_push_service( context, parent, parent_type );
881 }
882 else
883 {
884 fprintf( stderr, "filter closed with invalid parent...\n" );
885 }
886
887 // Close the dummy filter service
888 mlt_service_close( service );
889 }
890 else
891 {
892 fprintf( stderr, "Invalid top of stack on filter close\n" );
893 }
894 }
895
896 static void on_start_transition( deserialise_context context, const xmlChar *name, const xmlChar **atts)
897 {
898 // use a dummy service to hold properties to allow arbitrary nesting
899 mlt_service service = calloc( 1, sizeof( struct mlt_service_s ) );
900 mlt_service_init( service, NULL );
901
902 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
903
904 context_push_service( context, service, mlt_dummy_transition_type );
905
906 // Set the properties
907 for ( ; atts != NULL && *atts != NULL; atts += 2 )
908 mlt_properties_set( properties, (char*) atts[0], (char*) atts[1] );
909 }
910
911 static void on_end_transition( deserialise_context context, const xmlChar *name )
912 {
913 enum service_type type;
914 mlt_service service = context_pop_service( context, &type );
915 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
916
917 enum service_type parent_type = invalid_type;
918 mlt_service parent = context_pop_service( context, &parent_type );
919
920 if ( service != NULL && type == mlt_dummy_transition_type )
921 {
922 mlt_service effect = MLT_SERVICE( mlt_factory_transition(mlt_properties_get(properties,"mlt_service"), NULL ) );
923 mlt_properties effect_props = MLT_SERVICE_PROPERTIES( effect );
924
925 track_service( context->destructors, effect, (mlt_destructor) mlt_transition_close );
926
927 // Propogate the properties
928 qualify_property( context, properties, "resource" );
929 qualify_property( context, properties, "luma" );
930 qualify_property( context, properties, "luma.resource" );
931 qualify_property( context, properties, "composite.luma" );
932 qualify_property( context, properties, "producer.resource" );
933 mlt_properties_inherit( effect_props, properties );
934
935 // Attach all filters from service onto effect
936 attach_filters( effect, service );
937
938 // Associate the filter with the parent
939 if ( parent != NULL )
940 {
941 if ( parent_type == mlt_tractor_type )
942 {
943 mlt_field field = mlt_tractor_field( MLT_TRACTOR( parent ) );
944 if ( mlt_properties_get_int( properties, "a_track" ) == mlt_properties_get_int( properties, "b_track" ) )
945 mlt_properties_set_int( properties, "b_track", mlt_properties_get_int( properties, "a_track" ) + 1 );
946 mlt_field_plant_transition( field, MLT_TRANSITION( effect ),
947 mlt_properties_get_int( properties, "a_track" ),
948 mlt_properties_get_int( properties, "b_track" ) );
949 mlt_transition_set_in_and_out( MLT_TRANSITION( effect ),
950 mlt_properties_get_int( properties, "in" ),
951 mlt_properties_get_int( properties, "out" ) );
952 }
953 else
954 {
955 fprintf( stderr, "Misplaced transition - ignoring\n" );
956 }
957
958 // Put the parent back on the stack
959 context_push_service( context, parent, parent_type );
960 }
961 else
962 {
963 fprintf( stderr, "transition closed with invalid parent...\n" );
964 }
965
966 // Close the dummy filter service
967 mlt_service_close( service );
968 }
969 else
970 {
971 fprintf( stderr, "Invalid top of stack on transition close\n" );
972 }
973 }
974
975 static void on_start_property( deserialise_context context, const xmlChar *name, const xmlChar **atts)
976 {
977 enum service_type type;
978 mlt_service service = context_pop_service( context, &type );
979 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
980 char *value = NULL;
981
982 if ( service != NULL )
983 {
984 // Set the properties
985 for ( ; atts != NULL && *atts != NULL; atts += 2 )
986 {
987 if ( xmlStrcmp( atts[ 0 ], _x("name") ) == 0 )
988 context->property = strdup( _s(atts[ 1 ]) );
989 else if ( xmlStrcmp( atts[ 0 ], _x("value") ) == 0 )
990 value = _s(atts[ 1 ]);
991 }
992
993 if ( context->property != NULL )
994 mlt_properties_set( properties, context->property, value == NULL ? "" : value );
995
996 // Tell parser to collect any further nodes for serialisation
997 context->is_value = 1;
998
999 context_push_service( context, service, type );
1000 }
1001 else
1002 {
1003 fprintf( stderr, "Property without a service '%s'?\n", ( char * )name );
1004 }
1005 }
1006
1007 static void on_end_property( deserialise_context context, const xmlChar *name )
1008 {
1009 enum service_type type;
1010 mlt_service service = context_pop_service( context, &type );
1011 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1012
1013 if ( service != NULL )
1014 {
1015 // Tell parser to stop building a tree
1016 context->is_value = 0;
1017
1018 // See if there is a xml tree for the value
1019 if ( context->property != NULL && context->value_doc != NULL )
1020 {
1021 xmlChar *value;
1022 int size;
1023
1024 // Serialise the tree to get value
1025 xmlDocDumpMemory( context->value_doc, &value, &size );
1026 mlt_properties_set( properties, context->property, _s(value) );
1027 xmlFree( value );
1028 xmlFreeDoc( context->value_doc );
1029 context->value_doc = NULL;
1030 }
1031
1032 // Close this property handling
1033 free( context->property );
1034 context->property = NULL;
1035
1036 context_push_service( context, service, type );
1037 }
1038 else
1039 {
1040 fprintf( stderr, "Property without a service '%s'??\n", (char *)name );
1041 }
1042 }
1043
1044 static void on_start_element( void *ctx, const xmlChar *name, const xmlChar **atts)
1045 {
1046 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1047 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1048
1049 //printf("on_start_element: %s\n", name );
1050 context->branch[ context->depth ] ++;
1051 context->depth ++;
1052
1053 // Build a tree from nodes within a property value
1054 if ( context->is_value == 1 )
1055 {
1056 xmlNodePtr node = xmlNewNode( NULL, name );
1057
1058 if ( context->value_doc == NULL )
1059 {
1060 // Start a new tree
1061 context->value_doc = xmlNewDoc( _x("1.0") );
1062 xmlDocSetRootElement( context->value_doc, node );
1063 }
1064 else
1065 {
1066 // Append child to tree
1067 xmlAddChild( context->stack_node[ context->stack_node_size - 1 ], node );
1068 }
1069 context_push_node( context, node );
1070
1071 // Set the attributes
1072 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1073 xmlSetProp( node, atts[ 0 ], atts[ 1 ] );
1074 }
1075 else if ( xmlStrcmp( name, _x("tractor") ) == 0 )
1076 on_start_tractor( context, name, atts );
1077 else if ( xmlStrcmp( name, _x("multitrack") ) == 0 )
1078 on_start_multitrack( context, name, atts );
1079 else if ( xmlStrcmp( name, _x("playlist") ) == 0 || xmlStrcmp( name, _x("seq") ) == 0 || xmlStrcmp( name, _x("smil") ) == 0 )
1080 on_start_playlist( context, name, atts );
1081 else if ( xmlStrcmp( name, _x("producer") ) == 0 || xmlStrcmp( name, _x("video") ) == 0 )
1082 on_start_producer( context, name, atts );
1083 else if ( xmlStrcmp( name, _x("blank") ) == 0 )
1084 on_start_blank( context, name, atts );
1085 else if ( xmlStrcmp( name, _x("entry") ) == 0 )
1086 on_start_entry( context, name, atts );
1087 else if ( xmlStrcmp( name, _x("track") ) == 0 )
1088 on_start_track( context, name, atts );
1089 else if ( xmlStrcmp( name, _x("filter") ) == 0 )
1090 on_start_filter( context, name, atts );
1091 else if ( xmlStrcmp( name, _x("transition") ) == 0 )
1092 on_start_transition( context, name, atts );
1093 else if ( xmlStrcmp( name, _x("property") ) == 0 )
1094 on_start_property( context, name, atts );
1095 else if ( xmlStrcmp( name, _x("westley") ) == 0 )
1096 for ( ; atts != NULL && *atts != NULL; atts += 2 )
1097 mlt_properties_set( context->producer_map, ( char * )atts[ 0 ], ( char * )atts[ 1 ] );
1098 }
1099
1100 static void on_end_element( void *ctx, const xmlChar *name )
1101 {
1102 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1103 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1104
1105 //printf("on_end_element: %s\n", name );
1106 if ( context->is_value == 1 && xmlStrcmp( name, _x("property") ) != 0 )
1107 context_pop_node( context );
1108 else if ( xmlStrcmp( name, _x("multitrack") ) == 0 )
1109 on_end_multitrack( context, name );
1110 else if ( xmlStrcmp( name, _x("playlist") ) == 0 || xmlStrcmp( name, _x("seq") ) == 0 || xmlStrcmp( name, _x("smil") ) == 0 )
1111 on_end_playlist( context, name );
1112 else if ( xmlStrcmp( name, _x("track") ) == 0 )
1113 on_end_track( context, name );
1114 else if ( xmlStrcmp( name, _x("entry") ) == 0 )
1115 on_end_entry( context, name );
1116 else if ( xmlStrcmp( name, _x("tractor") ) == 0 )
1117 on_end_tractor( context, name );
1118 else if ( xmlStrcmp( name, _x("property") ) == 0 )
1119 on_end_property( context, name );
1120 else if ( xmlStrcmp( name, _x("producer") ) == 0 || xmlStrcmp( name, _x("video") ) == 0 )
1121 on_end_producer( context, name );
1122 else if ( xmlStrcmp( name, _x("filter") ) == 0 )
1123 on_end_filter( context, name );
1124 else if ( xmlStrcmp( name, _x("transition") ) == 0 )
1125 on_end_transition( context, name );
1126
1127 context->branch[ context->depth ] = 0;
1128 context->depth --;
1129 }
1130
1131 static void on_characters( void *ctx, const xmlChar *ch, int len )
1132 {
1133 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1134 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1135 char *value = calloc( len + 1, 1 );
1136 enum service_type type;
1137 mlt_service service = context_pop_service( context, &type );
1138 mlt_properties properties = MLT_SERVICE_PROPERTIES( service );
1139
1140 if ( service != NULL )
1141 context_push_service( context, service, type );
1142
1143 value[ len ] = 0;
1144 strncpy( value, (const char*) ch, len );
1145
1146 if ( context->stack_node_size > 0 )
1147 xmlNodeAddContent( context->stack_node[ context->stack_node_size - 1 ], ( xmlChar* )value );
1148
1149 // libxml2 generates an on_characters immediately after a get_entity within
1150 // an element value, and we ignore it because it is called again during
1151 // actual substitution.
1152 else if ( context->property != NULL && context->entity_is_replace == 0 )
1153 {
1154 char *s = mlt_properties_get( properties, context->property );
1155 if ( s != NULL )
1156 {
1157 // Append new text to existing content
1158 char *new = calloc( strlen( s ) + len + 1, 1 );
1159 strcat( new, s );
1160 strcat( new, value );
1161 mlt_properties_set( properties, context->property, new );
1162 free( new );
1163 }
1164 else
1165 mlt_properties_set( properties, context->property, value );
1166 }
1167 context->entity_is_replace = 0;
1168
1169 free( value);
1170 }
1171
1172 /** Convert parameters parsed from resource into entity declarations.
1173 */
1174 static void params_to_entities( deserialise_context context )
1175 {
1176 if ( context->params != NULL )
1177 {
1178 int i;
1179
1180 // Add our params as entitiy declarations
1181 for ( i = 0; i < mlt_properties_count( context->params ); i++ )
1182 {
1183 xmlChar *name = ( xmlChar* )mlt_properties_get_name( context->params, i );
1184 xmlAddDocEntity( context->entity_doc, name, XML_INTERNAL_GENERAL_ENTITY,
1185 context->publicId, context->systemId, ( xmlChar* )mlt_properties_get( context->params, _s(name) ) );
1186 }
1187
1188 // Flag completion
1189 mlt_properties_close( context->params );
1190 context->params = NULL;
1191 }
1192 }
1193
1194 // The following 3 facilitate entity substitution in the SAX parser
1195 static void on_internal_subset( void *ctx, const xmlChar* name,
1196 const xmlChar* publicId, const xmlChar* systemId )
1197 {
1198 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1199 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1200
1201 context->publicId = publicId;
1202 context->systemId = systemId;
1203 xmlCreateIntSubset( context->entity_doc, name, publicId, systemId );
1204
1205 // Override default entities with our parameters
1206 params_to_entities( context );
1207 }
1208
1209 // TODO: Check this with Dan... I think this is for westley parameterisation
1210 // but it's breaking standard escaped entities (like &lt; etc).
1211 static void on_entity_declaration( void *ctx, const xmlChar* name, int type,
1212 const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
1213 {
1214 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1215 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1216
1217 xmlAddDocEntity( context->entity_doc, name, type, publicId, systemId, content );
1218 }
1219
1220 // TODO: Check this functionality (see on_entity_declaration)
1221 static xmlEntityPtr on_get_entity( void *ctx, const xmlChar* name )
1222 {
1223 struct _xmlParserCtxt *xmlcontext = ( struct _xmlParserCtxt* )ctx;
1224 deserialise_context context = ( deserialise_context )( xmlcontext->_private );
1225 xmlEntityPtr e = NULL;
1226
1227 // Setup for entity declarations if not ready
1228 if ( xmlGetIntSubset( context->entity_doc ) == NULL )
1229 {
1230 xmlCreateIntSubset( context->entity_doc, _x("westley"), _x(""), _x("") );
1231 context->publicId = _x("");
1232 context->systemId = _x("");
1233 }
1234
1235 // Add our parameters if not already
1236 params_to_entities( context );
1237
1238 e = xmlGetPredefinedEntity( name );
1239
1240 // Send signal to on_characters that an entity substitutin is pending
1241 if ( e == NULL )
1242 {
1243 e = xmlGetDocEntity( context->entity_doc, name );
1244 if ( e != NULL )
1245 context->entity_is_replace = 1;
1246 }
1247
1248 return e;
1249 }
1250
1251 /** Convert a hexadecimal character to its value.
1252 */
1253 static int tohex( char p )
1254 {
1255 return isdigit( p ) ? p - '0' : tolower( p ) - 'a' + 10;
1256 }
1257
1258 /** Decode a url-encoded string containing hexadecimal character sequences.
1259 */
1260 static char *url_decode( char *dest, char *src )
1261 {
1262 char *p = dest;
1263
1264 while ( *src )
1265 {
1266 if ( *src == '%' )
1267 {
1268 *p ++ = ( tohex( *( src + 1 ) ) << 4 ) | tohex( *( src + 2 ) );
1269 src += 3;
1270 }
1271 else
1272 {
1273 *p ++ = *src ++;
1274 }
1275 }
1276
1277 *p = *src;
1278 return dest;
1279 }
1280
1281 /** Extract the filename from a URL attaching parameters to a properties list.
1282 */
1283 static void parse_url( mlt_properties properties, char *url )
1284 {
1285 int i;
1286 int n = strlen( url );
1287 char *name = NULL;
1288 char *value = NULL;
1289
1290 for ( i = 0; i < n; i++ )
1291 {
1292 switch ( url[ i ] )
1293 {
1294 case '?':
1295 url[ i++ ] = '\0';
1296 name = &url[ i ];
1297 break;
1298
1299 case ':':
1300 case '=':
1301 url[ i++ ] = '\0';
1302 value = &url[ i ];
1303 break;
1304
1305 case '&':
1306 url[ i++ ] = '\0';
1307 if ( name != NULL && value != NULL )
1308 mlt_properties_set( properties, name, value );
1309 name = &url[ i ];
1310 value = NULL;
1311 break;
1312 }
1313 }
1314 if ( name != NULL && value != NULL )
1315 mlt_properties_set( properties, name, value );
1316 }
1317
1318 // Quick workaround to avoid unecessary libxml2 warnings
1319 static int file_exists( char *file )
1320 {
1321 char *name = strdup( file );
1322 int exists = 0;
1323 if ( name != NULL && strchr( name, '?' ) )
1324 *( strchr( name, '?' ) ) = '\0';
1325 if ( name != NULL )
1326 {
1327 FILE *f = fopen( name, "r" );
1328 exists = f != NULL;
1329 if ( exists ) fclose( f );
1330 }
1331 free( name );
1332 return exists;
1333 }
1334
1335 mlt_producer producer_westley_init( int info, char *data )
1336 {
1337 xmlSAXHandler *sax = calloc( 1, sizeof( xmlSAXHandler ) );
1338 struct deserialise_context_s *context = calloc( 1, sizeof( struct deserialise_context_s ) );
1339 mlt_properties properties = NULL;
1340 int i = 0;
1341 struct _xmlParserCtxt *xmlcontext;
1342 int well_formed = 0;
1343 char *filename = NULL;
1344
1345 if ( data == NULL || !strcmp( data, "" ) || ( info == 0 && !file_exists( data ) ) )
1346 return NULL;
1347
1348 context = calloc( 1, sizeof( struct deserialise_context_s ) );
1349 if ( context == NULL )
1350 return NULL;
1351
1352 context->producer_map = mlt_properties_new();
1353 context->destructors = mlt_properties_new();
1354 context->params = mlt_properties_new();
1355
1356 // Decode URL and parse parameters
1357 mlt_properties_set( context->producer_map, "root", "" );
1358 if ( info == 0 )
1359 {
1360 filename = strdup( data );
1361 parse_url( context->params, url_decode( filename, data ) );
1362
1363 // We need the directory prefix which was used for the westley
1364 if ( strchr( filename, '/' ) )
1365 {
1366 char *root = NULL;
1367 mlt_properties_set( context->producer_map, "root", filename );
1368 root = mlt_properties_get( context->producer_map, "root" );
1369 *( strrchr( root, '/' ) ) = '\0';
1370
1371 // If we don't have an absolute path here, we're heading for disaster...
1372 if ( root[ 0 ] != '/' )
1373 {
1374 char *cwd = getcwd( NULL, 0 );
1375 char *real = malloc( strlen( cwd ) + strlen( root ) + 2 );
1376 sprintf( real, "%s/%s", cwd, root );
1377 mlt_properties_set( context->producer_map, "root", real );
1378 free( real );
1379 free( cwd );
1380 }
1381 }
1382 }
1383
1384 // We need to track the number of registered filters
1385 mlt_properties_set_int( context->destructors, "registered", 0 );
1386
1387 // Setup SAX callbacks
1388 sax->startElement = on_start_element;
1389 sax->endElement = on_end_element;
1390 sax->characters = on_characters;
1391 sax->cdataBlock = on_characters;
1392 sax->internalSubset = on_internal_subset;
1393 sax->entityDecl = on_entity_declaration;
1394 sax->getEntity = on_get_entity;
1395
1396 // Setup libxml2 SAX parsing
1397 xmlInitParser();
1398 xmlSubstituteEntitiesDefault( 1 );
1399 // This is used to facilitate entity substitution in the SAX parser
1400 context->entity_doc = xmlNewDoc( _x("1.0") );
1401 if ( info == 0 )
1402 xmlcontext = xmlCreateFileParserCtxt( filename );
1403 else
1404 xmlcontext = xmlCreateMemoryParserCtxt( data, strlen( data ) );
1405
1406 // Invalid context - clean up and return NULL
1407 if ( xmlcontext == NULL )
1408 {
1409 mlt_properties_close( context->producer_map );
1410 mlt_properties_close( context->destructors );
1411 mlt_properties_close( context->params );
1412 free( context );
1413 free( sax );
1414 free( filename );
1415 return NULL;
1416 }
1417
1418 xmlcontext->sax = sax;
1419 xmlcontext->_private = ( void* )context;
1420
1421 // Parse
1422 xmlParseDocument( xmlcontext );
1423 well_formed = xmlcontext->wellFormed;
1424
1425 // Cleanup after parsing
1426 xmlFreeDoc( context->entity_doc );
1427 free( sax );
1428 xmlcontext->sax = NULL;
1429 xmlcontext->_private = NULL;
1430 xmlFreeParserCtxt( xmlcontext );
1431 xmlMemoryDump( ); // for debugging
1432
1433 // Get the last producer on the stack
1434 enum service_type type;
1435 mlt_service service = context_pop_service( context, &type );
1436 if ( well_formed && service != NULL )
1437 {
1438 // Verify it is a producer service (mlt_type="mlt_producer")
1439 // (producer, playlist, multitrack)
1440 char *type = mlt_properties_get( MLT_SERVICE_PROPERTIES( service ), "mlt_type" );
1441 if ( type == NULL || ( strcmp( type, "mlt_producer" ) != 0 && strcmp( type, "producer" ) != 0 ) )
1442 service = NULL;
1443 }
1444
1445 #ifdef DEBUG
1446 xmlDocPtr doc = westley_make_doc( service );
1447 xmlDocFormatDump( stdout, doc, 1 );
1448 xmlFreeDoc( doc );
1449 service = NULL;
1450 #endif
1451
1452 if ( well_formed && service != NULL )
1453 {
1454 char *title = mlt_properties_get( context->producer_map, "title" );
1455
1456 // Need the complete producer list for various reasons
1457 properties = context->destructors;
1458
1459 // Now make sure we don't have a reference to the service in the properties
1460 for ( i = mlt_properties_count( properties ) - 1; i >= 1; i -- )
1461 {
1462 char *name = mlt_properties_get_name( properties, i );
1463 if ( mlt_properties_get_data( properties, name, NULL ) == service )
1464 {
1465 mlt_properties_set_data( properties, name, service, 0, NULL, NULL );
1466 break;
1467 }
1468 }
1469
1470 // We are done referencing destructor property list
1471 // Set this var to service properties for convenience
1472 properties = MLT_SERVICE_PROPERTIES( service );
1473
1474 // Assign the title
1475 mlt_properties_set( properties, "title", title );
1476
1477 // Optimise for overlapping producers
1478 mlt_producer_optimise( MLT_PRODUCER( service ) );
1479
1480 // Handle deep copies
1481 if ( getenv( "MLT_WESTLEY_DEEP" ) == NULL )
1482 {
1483 // Now assign additional properties
1484 if ( info == 0 )
1485 mlt_properties_set( properties, "resource", data );
1486
1487 // This tells consumer_westley not to deep copy
1488 mlt_properties_set( properties, "westley", "was here" );
1489 }
1490 else
1491 {
1492 // Allow the project to be edited
1493 mlt_properties_set( properties, "_westley", "was here" );
1494 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
1495 }
1496 }
1497 else
1498 {
1499 // Return null if not well formed
1500 service = NULL;
1501 }
1502
1503 // Clean up
1504 mlt_properties_close( context->producer_map );
1505 if ( context->params != NULL )
1506 mlt_properties_close( context->params );
1507 mlt_properties_close( context->destructors );
1508 free( context );
1509 free( filename );
1510
1511 return MLT_PRODUCER( service );
1512 }
my melted branch