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>
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.
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.
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.
21 // TODO: destroy unreferenced producers (they are currently destroyed
22 // when the returned producer is closed).
23 // TODO: determine why deserialise_context can not be released.
25 #include "producer_westley.h"
26 #include <framework/mlt.h>
31 #include <libxml/parser.h>
32 #include <libxml/parserInternals.h> // for xmlCreateFileParserCtxt
33 #include <libxml/tree.h>
35 #define STACK_SIZE 1000
37 struct deserialise_context_s
39 mlt_service stack_service
[ STACK_SIZE
];
40 int stack_service_size
;
41 mlt_properties producer_map
;
42 mlt_properties destructors
;
44 mlt_properties producer_properties
;
47 xmlNodePtr stack_node
[ STACK_SIZE
];
51 typedef struct deserialise_context_s
*deserialise_context
;
57 static int context_push_service( deserialise_context
this, mlt_service that
)
59 int ret
= this->stack_service_size
>= STACK_SIZE
- 1;
61 this->stack_service
[ this->stack_service_size
++ ] = that
;
68 static mlt_service
context_pop_service( deserialise_context
this )
70 mlt_service result
= NULL
;
71 if ( this->stack_service_size
> 0 )
72 result
= this->stack_service
[ -- this->stack_service_size
];
79 static int context_push_node( deserialise_context
this, xmlNodePtr node
)
81 int ret
= this->stack_node_size
>= STACK_SIZE
- 1;
83 this->stack_node
[ this->stack_node_size
++ ] = node
;
90 static xmlNodePtr
context_pop_node( deserialise_context
this )
92 xmlNodePtr result
= NULL
;
93 if ( this->stack_node_size
> 0 )
94 result
= this->stack_node
[ -- this->stack_node_size
];
99 // Set the destructor on a new service
100 static void track_service( mlt_properties properties
, void *service
, mlt_destructor destructor
)
102 int registered
= mlt_properties_get_int( properties
, "registered" );
103 char *key
= mlt_properties_get( properties
, "registered" );
104 mlt_properties_set_data( properties
, key
, service
, 0, destructor
, NULL
);
105 mlt_properties_set_int( properties
, "registered", ++ registered
);
109 // Forward declarations
110 static void on_end_track( deserialise_context context
, const xmlChar
*name
);
111 static void on_end_entry( deserialise_context context
, const xmlChar
*name
);
113 static void on_start_tractor( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
115 mlt_service service
= mlt_tractor_service( mlt_tractor_init() );
116 mlt_properties properties
= mlt_service_properties( service
);
118 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_tractor_close
);
120 mlt_properties_set_position( properties
, "length", 0 );
122 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
123 mlt_properties_set( mlt_service_properties( service
), (char*) atts
[0], (char*) atts
[1] );
125 if ( mlt_properties_get_position( properties
, "length" ) < mlt_properties_get_position( properties
, "out" ) )
127 mlt_position length
= mlt_properties_get_position( properties
, "out" ) + 1;
128 mlt_properties_set_position( properties
, "length", length
);
131 if ( mlt_properties_get( properties
, "id" ) != NULL
)
132 mlt_properties_set_data( context
->producer_map
, mlt_properties_get( properties
, "id" ), service
, 0, NULL
, NULL
);
134 context_push_service( context
, service
);
137 static void on_start_multitrack( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
139 mlt_service service
= mlt_multitrack_service( mlt_multitrack_init() );
140 mlt_properties properties
= mlt_service_properties( service
);
142 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_multitrack_close
);
144 mlt_properties_set_position( properties
, "length", 0 );
146 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
147 mlt_properties_set( properties
, (char*) atts
[0], (char*) atts
[1] );
149 if ( mlt_properties_get( properties
, "id" ) != NULL
)
150 mlt_properties_set_data( context
->producer_map
, mlt_properties_get( properties
, "id" ), service
, 0, NULL
, NULL
);
152 context_push_service( context
, service
);
155 static void on_start_playlist( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
157 mlt_service service
= mlt_playlist_service( mlt_playlist_init() );
158 mlt_properties properties
= mlt_service_properties( service
);
160 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_playlist_close
);
162 mlt_properties_set_position( properties
, "length", 0 );
164 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
166 mlt_properties_set( properties
, ( char* )atts
[0], ( char* )atts
[1] );
168 // Out will be overwritten later as we append, so we need to save it
169 if ( strcmp( atts
[ 0 ], "out" ) == 0 )
170 mlt_properties_set( properties
, "_westley.out", ( char* )atts
[ 1 ] );
173 if ( mlt_properties_get( properties
, "id" ) != NULL
)
174 mlt_properties_set_data( context
->producer_map
, mlt_properties_get( properties
, "id" ), service
, 0, NULL
, NULL
);
176 context_push_service( context
, service
);
179 static void on_start_producer( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
181 mlt_properties properties
= context
->producer_properties
= mlt_properties_new();
183 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
185 mlt_properties_set( properties
, (char*) atts
[0], (char*) atts
[1] );
189 static void on_start_blank( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
191 // Get the playlist from the stack
192 mlt_service service
= context_pop_service( context
);
193 mlt_position length
= 0;
195 if ( service
== NULL
)
198 // Look for the length attribute
199 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
201 if ( strcmp( atts
[0], "length" ) == 0 )
203 length
= atoll( atts
[1] );
208 // Append a blank to the playlist
209 mlt_playlist_blank( MLT_PLAYLIST( service
), length
- 1 );
211 // Push the playlist back onto the stack
212 context_push_service( context
, service
);
215 static void on_start_entry_track( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
217 // Use a dummy service to hold properties to allow arbitrary nesting
218 mlt_service service
= calloc( 1, sizeof( struct mlt_service_s
) );
219 mlt_service_init( service
, NULL
);
221 // Push the dummy service onto the stack
222 context_push_service( context
, service
);
224 if ( strcmp( name
, "entry" ) == 0 )
225 mlt_properties_set( mlt_service_properties( service
), "resource", "<entry>" );
227 mlt_properties_set( mlt_service_properties( service
), "resource", "<track>" );
229 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
231 mlt_properties_set( mlt_service_properties( service
), (char*) atts
[0], (char*) atts
[1] );
233 // Look for the producer attribute
234 if ( strcmp( atts
[ 0 ], "producer" ) == 0 )
236 if ( mlt_properties_get_data( context
->producer_map
, (char*) atts
[1], NULL
) != NULL
)
237 // Push the referenced producer onto the stack
238 context_push_service( context
, MLT_SERVICE( mlt_properties_get_data( context
->producer_map
, (char*) atts
[1], NULL
) ) );
240 // Remove the dummy service to cause end element failure
241 context_pop_service( context
);
246 static void on_start_filter( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
248 mlt_properties properties
= context
->producer_properties
= mlt_properties_new();
250 // Set the properties
251 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
252 mlt_properties_set( properties
, (char*) atts
[0], (char*) atts
[1] );
255 static void on_start_transition( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
257 mlt_properties properties
= context
->producer_properties
= mlt_properties_new();
259 // Set the properties
260 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
261 mlt_properties_set( properties
, (char*) atts
[0], (char*) atts
[1] );
264 static void on_start_property( deserialise_context context
, const xmlChar
*name
, const xmlChar
**atts
)
266 mlt_properties properties
= context
->producer_properties
;
269 if ( properties
== NULL
)
272 // Set the properties
273 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
275 if ( strcmp( atts
[ 0 ], "name" ) == 0 )
277 context
->property
= strdup( atts
[ 1 ] );
279 else if ( strcmp( atts
[ 0 ], "value" ) == 0 )
281 value
= (char*) atts
[ 1 ];
285 if ( context
->property
!= NULL
&& value
!= NULL
)
286 mlt_properties_set( properties
, context
->property
, value
);
288 // Tell parser to collect any further nodes for serialisation
289 context
->is_value
= 1;
293 /** This function adds a producer to a playlist or multitrack when
294 there is no entry or track element.
297 static int add_producer( deserialise_context context
, mlt_service service
, mlt_position in
, mlt_position out
)
299 // Get the parent producer
300 mlt_service producer
= context_pop_service( context
);
301 if ( producer
!= NULL
)
303 char *resource
= mlt_properties_get( mlt_service_properties( producer
), "resource" );
305 // Put the parent producer back
306 context_push_service( context
, producer
);
308 // If the parent producer is a multitrack or playlist (not a track or entry)
309 if ( resource
&& ( strcmp( resource
, "<playlist>" ) == 0 ||
310 strcmp( resource
, "<multitrack>" ) == 0 ) )
312 if ( strcmp( resource
, "<playlist>" ) == 0 )
314 // Append this producer to the playlist
315 mlt_playlist_append_io( MLT_PLAYLIST( producer
),
316 MLT_PRODUCER( service
), in
, out
);
320 // Set this producer on the multitrack
321 mlt_multitrack_connect( MLT_MULTITRACK( producer
),
322 MLT_PRODUCER( service
),
323 mlt_multitrack_count( MLT_MULTITRACK( producer
) ) );
325 // Normally, the enclosing entry or track will pop this service off
326 // In its absence we do not push it on.
333 static void on_end_multitrack( deserialise_context context
, const xmlChar
*name
)
335 // Get the multitrack from the stack
336 mlt_service producer
= context_pop_service( context
);
337 if ( producer
== NULL
)
340 // Get the tractor from the stack
341 mlt_service service
= context_pop_service( context
);
343 // Create a tractor if one does not exist
344 char *resource
= NULL
;
345 if ( service
!= NULL
)
346 resource
= mlt_properties_get( mlt_service_properties( service
), "resource" );
347 if ( service
== NULL
|| resource
== NULL
|| strcmp( resource
, "<tractor>" ) )
349 // Put the anonymous service back onto the stack!
350 context_push_service( context
, service
);
352 service
= mlt_tractor_service( mlt_tractor_init() );
353 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_tractor_close
);
355 // Inherit the producer's properties
356 mlt_properties properties
= mlt_service_properties( service
);
357 mlt_properties_set_position( properties
, "length", mlt_producer_get_out( MLT_PRODUCER( producer
) ) + 1 );
358 mlt_producer_set_in_and_out( MLT_PRODUCER( service
), 0, mlt_producer_get_out( MLT_PRODUCER( producer
) ) );
359 mlt_properties_set_double( properties
, "fps", mlt_producer_get_fps( MLT_PRODUCER( producer
) ) );
362 // Connect the tractor to the multitrack
363 mlt_tractor_connect( MLT_TRACTOR( service
), producer
);
364 mlt_properties_set_data( mlt_service_properties( service
), "multitrack",
365 MLT_MULTITRACK( producer
), 0, NULL
, NULL
);
367 // See if the producer should be added to a playlist or multitrack
368 add_producer( context
, service
, 0, mlt_producer_get_out( MLT_PRODUCER( producer
) ) );
370 // Always push the multitrack back onto the stack for filters and transitions
371 context_push_service( context
, producer
);
373 // Always push the tractor back onto the stack for filters and transitions
374 context_push_service( context
, service
);
377 static void on_end_playlist( deserialise_context context
, const xmlChar
*name
)
379 // Get the playlist from the stack
380 mlt_service producer
= context_pop_service( context
);
381 if ( producer
== NULL
)
383 mlt_properties properties
= mlt_service_properties( producer
);
385 mlt_position in
= mlt_properties_get_position( properties
, "in" );
388 if ( mlt_properties_get( properties
, "_westley.out" ) != NULL
)
389 out
= mlt_properties_get_position( properties
, "_westley.out" );
391 out
= mlt_properties_get_position( properties
, "length" ) - 1;
393 if ( mlt_properties_get_position( properties
, "length" ) < out
)
394 mlt_properties_set_position( properties
, "length", out
+ 1 );
396 mlt_producer_set_in_and_out( MLT_PRODUCER( producer
), in
, out
);
398 // See if the playlist should be added to a playlist or multitrack
399 if ( add_producer( context
, producer
, in
, out
) == 0 )
401 // Otherwise, push the playlist back onto the stack
402 context_push_service( context
, producer
);
405 static void on_end_track( deserialise_context context
, const xmlChar
*name
)
407 // Get the producer from the stack
408 mlt_service producer
= context_pop_service( context
);
409 if ( producer
== NULL
)
412 // See if the producer is a tractor
413 char *resource
= mlt_properties_get( mlt_service_properties( producer
), "resource" );
414 if ( resource
&& strcmp( resource
, "<tractor>" ) == 0 )
415 // If so chomp its producer
416 context_pop_service( context
);
418 // Get the dummy track service from the stack
419 mlt_service track
= context_pop_service( context
);
420 if ( track
== NULL
|| strcmp( mlt_properties_get( mlt_service_properties( track
), "resource" ), "<track>" ) )
422 context_push_service( context
, producer
);
426 // Get the multitrack from the stack
427 mlt_service service
= context_pop_service( context
);
428 if ( service
== NULL
)
430 context_push_service( context
, producer
);
434 // Set the track on the multitrack
435 mlt_multitrack_connect( MLT_MULTITRACK( service
),
436 MLT_PRODUCER( producer
),
437 mlt_multitrack_count( MLT_MULTITRACK( service
) ) );
439 // Set producer i/o if specified
440 if ( mlt_properties_get( mlt_service_properties( track
), "in" ) != NULL
||
441 mlt_properties_get( mlt_service_properties( track
), "out" ) != NULL
)
443 mlt_producer_set_in_and_out( MLT_PRODUCER( producer
),
444 mlt_properties_get_position( mlt_service_properties( track
), "in" ),
445 mlt_properties_get_position( mlt_service_properties( track
), "out" ) );
448 // Push the multitrack back onto the stack
449 context_push_service( context
, service
);
451 mlt_service_close( track
);
454 static void on_end_entry( deserialise_context context
, const xmlChar
*name
)
456 // Get the producer from the stack
457 mlt_service producer
= context_pop_service( context
);
458 if ( producer
== NULL
)
461 // See if the producer is a tractor
462 char *resource
= mlt_properties_get( mlt_service_properties( producer
), "resource" );
463 if ( resource
&& strcmp( resource
, "<tractor>" ) == 0 )
464 // If so chomp its producer
465 context_pop_service( context
);
467 // Get the dummy entry service from the stack
468 mlt_service entry
= context_pop_service( context
);
469 if ( entry
== NULL
|| strcmp( mlt_properties_get( mlt_service_properties( entry
), "resource" ), "<entry>" ) )
471 context_push_service( context
, producer
);
475 // Get the playlist from the stack
476 mlt_service service
= context_pop_service( context
);
477 if ( service
== NULL
)
479 context_push_service( context
, producer
);
483 // Append the producer to the playlist
484 if ( mlt_properties_get( mlt_service_properties( entry
), "in" ) != NULL
||
485 mlt_properties_get( mlt_service_properties( entry
), "out" ) != NULL
)
487 mlt_playlist_append_io( MLT_PLAYLIST( service
),
488 MLT_PRODUCER( producer
),
489 mlt_properties_get_position( mlt_service_properties( entry
), "in" ),
490 mlt_properties_get_position( mlt_service_properties( entry
), "out" ) );
494 mlt_playlist_append( MLT_PLAYLIST( service
), MLT_PRODUCER( producer
) );
497 // Push the playlist back onto the stack
498 context_push_service( context
, service
);
500 mlt_service_close( entry
);
503 static void on_end_tractor( deserialise_context context
, const xmlChar
*name
)
506 mlt_service tractor
= context_pop_service( context
);
507 if ( tractor
== NULL
)
510 // Get the tractor's multitrack
511 mlt_producer multitrack
= mlt_properties_get_data( mlt_service_properties( tractor
), "multitrack", NULL
);
512 if ( multitrack
!= NULL
)
514 // Inherit the producer's properties
515 mlt_properties properties
= mlt_producer_properties( MLT_PRODUCER( tractor
) );
516 mlt_properties_set_position( properties
, "length", mlt_producer_get_out( multitrack
) + 1 );
517 mlt_producer_set_in_and_out( multitrack
, 0, mlt_producer_get_out( multitrack
) );
518 mlt_properties_set_double( properties
, "fps", mlt_producer_get_fps( multitrack
) );
521 // See if the tractor should be added to a playlist or multitrack
522 if ( add_producer( context
, tractor
, 0, mlt_producer_get_out( MLT_PRODUCER( tractor
) ) ) == 0 )
524 // Otherwise, push the tractor back onto the stack
525 context_push_service( context
, tractor
);
528 static void on_end_property( deserialise_context context
, const xmlChar
*name
)
530 // Tell parser to stop building a tree
531 context
->is_value
= 0;
533 // See if there is a xml tree for the value
534 if ( context
->property
!= NULL
&& context
->value_doc
!= NULL
)
539 // Serialise the tree to get value
540 xmlDocDumpMemory( context
->value_doc
, &value
, &size
);
541 mlt_properties_set( context
->producer_properties
, context
->property
, value
);
543 xmlFreeDoc( context
->value_doc
);
544 context
->value_doc
= NULL
;
547 // Close this property handling
548 free( context
->property
);
549 context
->property
= NULL
;
552 static void on_end_producer( deserialise_context context
, const xmlChar
*name
)
554 mlt_properties properties
= context
->producer_properties
;
555 mlt_service service
= NULL
;
557 if ( properties
== NULL
)
560 char *resource
= mlt_properties_get( properties
, "resource" );
561 // Let Kino-SMIL src be a synonym for resource
562 if ( resource
== NULL
)
563 resource
= mlt_properties_get( properties
, "src" );
565 // Instantiate the producer
566 if ( mlt_properties_get( properties
, "mlt_service" ) != NULL
)
568 service
= MLT_SERVICE( mlt_factory_producer( "fezzik", mlt_properties_get( properties
, "mlt_service" ) ) );
570 if ( service
== NULL
&& resource
!= NULL
)
572 char *root
= mlt_properties_get( context
->producer_map
, "_root" );
573 char *full_resource
= malloc( strlen( root
) + strlen( resource
) + 1 );
574 if ( resource
[ 0 ] != '/' )
576 strcpy( full_resource
, root
);
577 strcat( full_resource
, resource
);
581 strcpy( full_resource
, resource
);
583 service
= MLT_SERVICE( mlt_factory_producer( "fezzik", full_resource
) );
584 free( full_resource
);
586 if ( service
== NULL
)
588 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_producer_close
);
590 // Add the producer to the producer map
591 if ( mlt_properties_get( properties
, "id" ) != NULL
)
592 mlt_properties_set_data( context
->producer_map
, mlt_properties_get( properties
, "id" ), service
, 0, NULL
, NULL
);
594 // Handle in/out properties separately
595 mlt_position in
= -1;
596 mlt_position out
= -1;
599 if ( mlt_properties_get( properties
, "in" ) != NULL
)
600 in
= mlt_properties_get_position( properties
, "in" );
601 // Let Kino-SMIL clipBegin be a synonym for in
602 if ( mlt_properties_get( properties
, "clipBegin" ) != NULL
)
603 in
= mlt_properties_get_position( properties
, "clipBegin" );
605 if ( mlt_properties_get( properties
, "out" ) != NULL
)
606 out
= mlt_properties_get_position( properties
, "out" );
607 // Let Kino-SMIL clipEnd be a synonym for out
608 if ( mlt_properties_get( properties
, "clipEnd" ) != NULL
)
609 out
= mlt_properties_get_position( properties
, "clipEnd" );
612 mlt_properties_set( properties
, "in", NULL
);
613 mlt_properties_set( properties
, "out", NULL
);
615 mlt_properties_inherit( mlt_service_properties( service
), properties
);
616 mlt_properties_close( properties
);
617 context
->producer_properties
= NULL
;
619 // See if the producer should be added to a playlist or multitrack
620 if ( add_producer( context
, service
, in
, out
) == 0 )
622 // Otherwise, set in and out on...
623 if ( in
!= -1 || out
!= -1 )
625 // Get the parent service
626 mlt_service parent
= context_pop_service( context
);
627 if ( parent
!= NULL
)
629 // Get the parent properties
630 properties
= mlt_service_properties( parent
);
632 char *resource
= mlt_properties_get( properties
, "resource" );
634 // Put the parent producer back
635 context_push_service( context
, parent
);
637 // If the parent is a track or entry
638 if ( resource
&& ( strcmp( resource
, "<entry>" ) == 0 ) )
640 mlt_properties_set_position( properties
, "in", in
);
641 mlt_properties_set_position( properties
, "out", out
);
645 // Otherwise, set in and out on producer directly
646 mlt_producer_set_in_and_out( MLT_PRODUCER( service
), in
, out
);
651 // Otherwise, set in and out on producer directly
652 mlt_producer_set_in_and_out( MLT_PRODUCER( service
), in
, out
);
656 // Push the producer onto the stack
657 context_push_service( context
, service
);
661 static void on_end_filter( deserialise_context context
, const xmlChar
*name
)
663 mlt_properties properties
= context
->producer_properties
;
664 if ( properties
== NULL
)
670 mlt_service tractor
= NULL
;
672 // Get the producer from the stack
673 mlt_service producer
= context_pop_service( context
);
674 if ( producer
== NULL
)
677 // See if the producer is a tractor
678 char *resource
= mlt_properties_get( mlt_service_properties( producer
), "resource" );
679 if ( resource
!= NULL
&& strcmp( resource
, "<tractor>" ) == 0 )
681 // If so, then get the next producer
683 producer
= context_pop_service( context
);
686 //fprintf( stderr, "connecting filter to %s\n", mlt_properties_get( mlt_service_properties( producer ), "resource" ) );
689 mlt_service service
= MLT_SERVICE( mlt_factory_filter( mlt_properties_get( properties
, "mlt_service" ), NULL
) );
690 if ( service
== NULL
)
692 context_push_service( context
, producer
);
695 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_filter_close
);
697 // Connect the filter to the producer
698 mlt_filter_connect( MLT_FILTER( service
), producer
,
699 mlt_properties_get_int( properties
, "track" ) );
701 // Set in and out from producer if non existant
702 if ( mlt_properties_get( properties
, "in" ) == NULL
)
703 mlt_properties_set_position( properties
, "in", mlt_producer_get_in( MLT_PRODUCER( producer
) ) );
704 if ( mlt_properties_get( properties
, "out" ) == NULL
)
705 mlt_properties_set_position( properties
, "out", mlt_producer_get_out( MLT_PRODUCER( producer
) ) );
707 // Propogate the properties
708 mlt_properties_inherit( mlt_service_properties( service
), properties
);
709 mlt_properties_close( properties
);
710 context
->producer_properties
= NULL
;
711 properties
= mlt_service_properties( service
);
713 // Set in and out again due to inheritance
714 mlt_filter_set_in_and_out( MLT_FILTER( service
),
715 mlt_properties_get_position( properties
, "in" ),
716 mlt_properties_get_position( properties
, "out" ) );
718 // If a producer alias is in the producer_map, get it
719 snprintf( key
, 10, "%p", producer
);
720 if ( mlt_properties_get_data( context
->producer_map
, key
, NULL
) != NULL
)
721 producer
= mlt_properties_get_data( context
->producer_map
, key
, NULL
);
723 // Put the producer in the producer map
724 id
= mlt_properties_get( mlt_service_properties( producer
), "id" );
726 mlt_properties_set_data( context
->producer_map
, id
, service
, 0, NULL
, NULL
);
728 // For filter chain support, add an alias to the producer map
729 snprintf( key
, 10, "%p", service
);
730 mlt_properties_set_data( context
->producer_map
, key
, producer
, 0, NULL
, NULL
);
732 // Push the filter onto the stack
733 context_push_service( context
, service
);
735 if ( tractor
!= NULL
)
737 // Connect the tractor to the filter
738 mlt_tractor_connect( MLT_TRACTOR( tractor
), service
);
740 // Push the tractor back onto the stack
741 context_push_service( context
, tractor
);
745 static void on_end_transition( deserialise_context context
, const xmlChar
*name
)
747 mlt_service tractor
= NULL
;
748 mlt_properties properties
= context
->producer_properties
;
749 if ( properties
== NULL
)
752 // Get the producer from the stack
753 mlt_service producer
= context_pop_service( context
);
754 if ( producer
== NULL
)
757 // See if the producer is a tractor
758 char *resource
= mlt_properties_get( mlt_service_properties( producer
), "resource" );
759 if ( resource
!= NULL
&& strcmp( resource
, "<tractor>" ) == 0 )
761 // If so, then get the next producer
763 producer
= context_pop_service( context
);
766 // Create the transition
767 mlt_service service
= MLT_SERVICE( mlt_factory_transition( mlt_properties_get( properties
, "mlt_service" ), NULL
) );
768 if ( service
== NULL
)
770 context_push_service( context
, producer
);
773 track_service( context
->destructors
, service
, (mlt_destructor
) mlt_transition_close
);
775 // Propogate the properties
776 mlt_properties_inherit( mlt_service_properties( service
), properties
);
777 mlt_properties_close( properties
);
778 context
->producer_properties
= NULL
;
779 properties
= mlt_service_properties( service
);
781 // Set in and out again due to inheritance
782 mlt_transition_set_in_and_out( MLT_TRANSITION( service
),
783 mlt_properties_get_position( properties
, "in" ),
784 mlt_properties_get_position( properties
, "out" ) );
786 // Connect the transition to the producer
787 mlt_transition_connect( MLT_TRANSITION( service
), producer
,
788 mlt_properties_get_int( properties
, "a_track" ),
789 mlt_properties_get_int( properties
, "b_track" ) );
791 // Push the transition onto the stack
792 context_push_service( context
, service
);
794 if ( tractor
!= NULL
)
796 // Connect the tractor to the transition
797 mlt_tractor_connect( MLT_TRACTOR( tractor
), service
);
799 // Push the tractor back onto the stack
800 context_push_service( context
, tractor
);
804 static void on_start_element( void *ctx
, const xmlChar
*name
, const xmlChar
**atts
)
806 struct _xmlParserCtxt
*xmlcontext
= ( struct _xmlParserCtxt
* )ctx
;
807 deserialise_context context
= ( deserialise_context
)( xmlcontext
->_private
);
809 // Build a tree from nodes within a property value
810 if ( context
->is_value
== 1 )
812 xmlNodePtr node
= xmlNewNode( NULL
, name
);
814 if ( context
->value_doc
== NULL
)
817 context
->value_doc
= xmlNewDoc( "1.0" );
818 xmlDocSetRootElement( context
->value_doc
, node
);
822 // Append child to tree
823 xmlAddChild( context
->stack_node
[ context
->stack_node_size
- 1 ], node
);
825 context_push_node( context
, node
);
827 // Set the attributes
828 for ( ; atts
!= NULL
&& *atts
!= NULL
; atts
+= 2 )
829 xmlSetProp( node
, atts
[ 0 ], atts
[ 1 ] );
831 else if ( strcmp( name
, "tractor" ) == 0 )
832 on_start_tractor( context
, name
, atts
);
833 else if ( strcmp( name
, "multitrack" ) == 0 )
834 on_start_multitrack( context
, name
, atts
);
835 else if ( strcmp( name
, "playlist" ) == 0 || strcmp( name
, "seq" ) == 0 || strcmp( name
, "smil" ) == 0 )
836 on_start_playlist( context
, name
, atts
);
837 else if ( strcmp( name
, "producer" ) == 0 || strcmp( name
, "video" ) == 0 )
838 on_start_producer( context
, name
, atts
);
839 else if ( strcmp( name
, "blank" ) == 0 )
840 on_start_blank( context
, name
, atts
);
841 else if ( strcmp( name
, "entry" ) == 0 || strcmp( name
, "track" ) == 0 )
842 on_start_entry_track( context
, name
, atts
);
843 else if ( strcmp( name
, "filter" ) == 0 )
844 on_start_filter( context
, name
, atts
);
845 else if ( strcmp( name
, "transition" ) == 0 )
846 on_start_transition( context
, name
, atts
);
847 else if ( strcmp( name
, "property" ) == 0 )
848 on_start_property( context
, name
, atts
);
851 static void on_end_element( void *ctx
, const xmlChar
*name
)
853 struct _xmlParserCtxt
*xmlcontext
= ( struct _xmlParserCtxt
* )ctx
;
854 deserialise_context context
= ( deserialise_context
)( xmlcontext
->_private
);
856 if ( context
->is_value
== 1 && strcmp( name
, "property" ) != 0 )
857 context_pop_node( context
);
858 else if ( strcmp( name
, "multitrack" ) == 0 )
859 on_end_multitrack( context
, name
);
860 else if ( strcmp( name
, "playlist" ) == 0 || strcmp( name
, "seq" ) == 0 || strcmp( name
, "smil" ) == 0 )
861 on_end_playlist( context
, name
);
862 else if ( strcmp( name
, "track" ) == 0 )
863 on_end_track( context
, name
);
864 else if ( strcmp( name
, "entry" ) == 0 )
865 on_end_entry( context
, name
);
866 else if ( strcmp( name
, "tractor" ) == 0 )
867 on_end_tractor( context
, name
);
868 else if ( strcmp( name
, "property" ) == 0 )
869 on_end_property( context
, name
);
870 else if ( strcmp( name
, "producer" ) == 0 || strcmp( name
, "video" ) == 0 )
871 on_end_producer( context
, name
);
872 else if ( strcmp( name
, "filter" ) == 0 )
873 on_end_filter( context
, name
);
874 else if ( strcmp( name
, "transition" ) == 0 )
875 on_end_transition( context
, name
);
878 static void on_characters( void *ctx
, const xmlChar
*ch
, int len
)
880 struct _xmlParserCtxt
*xmlcontext
= ( struct _xmlParserCtxt
* )ctx
;
881 deserialise_context context
= ( deserialise_context
)( xmlcontext
->_private
);
882 char *value
= calloc( len
+ 1, 1 );
885 strncpy( value
, (const char*) ch
, len
);
887 if ( context
->stack_node_size
> 0 )
888 xmlNodeAddContent( context
->stack_node
[ context
->stack_node_size
- 1 ], ( xmlChar
* )value
);
890 else if ( context
->property
!= NULL
&& context
->producer_properties
!= NULL
)
891 mlt_properties_set( context
->producer_properties
, context
->property
, value
);
896 // The following 3 facilitate entity substitution in the SAX parser
897 static void on_internal_subset( void *ctx
, const xmlChar
* name
,
898 const xmlChar
* publicId
, const xmlChar
* systemId
)
900 struct _xmlParserCtxt
*xmlcontext
= ( struct _xmlParserCtxt
* )ctx
;
901 deserialise_context context
= ( deserialise_context
)( xmlcontext
->_private
);
903 xmlCreateIntSubset( context
->entity_doc
, name
, publicId
, systemId
);
906 static void on_entity_declaration( void *ctx
, const xmlChar
* name
, int type
,
907 const xmlChar
* publicId
, const xmlChar
* systemId
, xmlChar
* content
)
909 struct _xmlParserCtxt
*xmlcontext
= ( struct _xmlParserCtxt
* )ctx
;
910 deserialise_context context
= ( deserialise_context
)( xmlcontext
->_private
);
912 xmlAddDocEntity( context
->entity_doc
, name
, type
, publicId
, systemId
, content
);
915 xmlEntityPtr
on_get_entity( void *ctx
, const xmlChar
* name
)
917 struct _xmlParserCtxt
*xmlcontext
= ( struct _xmlParserCtxt
* )ctx
;
918 deserialise_context context
= ( deserialise_context
)( xmlcontext
->_private
);
920 return xmlGetDocEntity( context
->entity_doc
, name
);
924 mlt_producer
producer_westley_init( char *filename
)
926 xmlSAXHandler
*sax
= calloc( 1, sizeof( xmlSAXHandler
) );
927 struct deserialise_context_s
*context
= calloc( 1, sizeof( struct deserialise_context_s
) );
928 mlt_properties properties
= NULL
;
930 struct _xmlParserCtxt
*xmlcontext
;
933 context
->producer_map
= mlt_properties_new();
934 context
->destructors
= mlt_properties_new();
936 // We need to track the number of registered filters
937 mlt_properties_set_int( context
->destructors
, "registered", 0 );
939 // We need the directory prefix which was used for the westley
940 mlt_properties_set( context
->producer_map
, "_root", "" );
941 if ( strchr( filename
, '/' ) )
944 mlt_properties_set( context
->producer_map
, "_root", filename
);
945 root
= mlt_properties_get( context
->producer_map
, "_root" );
946 *( strrchr( root
, '/' ) + 1 ) = '\0';
949 // Setup SAX callbacks
950 sax
->startElement
= on_start_element
;
951 sax
->endElement
= on_end_element
;
952 sax
->characters
= on_characters
;
953 sax
->cdataBlock
= on_characters
;
954 sax
->internalSubset
= on_internal_subset
;
955 sax
->entityDecl
= on_entity_declaration
;
956 sax
->getEntity
= on_get_entity
;
958 // Setup libxml2 SAX parsing
960 xmlSubstituteEntitiesDefault( 1 );
961 // This is used to facilitate entity substitution in the SAX parser
962 context
->entity_doc
= xmlNewDoc( "1.0" );
963 xmlcontext
= xmlCreateFileParserCtxt( filename
);
964 xmlcontext
->sax
= sax
;
965 xmlcontext
->_private
= ( void* )context
;
968 xmlParseDocument( xmlcontext
);
969 well_formed
= xmlcontext
->wellFormed
;
971 // Cleanup after parsing
972 xmlFreeDoc( context
->entity_doc
);
974 xmlcontext
->sax
= NULL
;
975 xmlcontext
->_private
= NULL
;
976 xmlFreeParserCtxt( xmlcontext
);
977 xmlMemoryDump( ); // for debugging
979 // Get the last producer on the stack
980 mlt_service service
= context_pop_service( context
);
981 if ( well_formed
&& service
!= NULL
)
983 // Verify it is a producer service (mlt_type="mlt_producer")
984 // (producer, playlist, multitrack)
985 char *type
= mlt_properties_get( mlt_service_properties( service
), "mlt_type" );
986 if ( type
== NULL
|| ( strcmp( type
, "mlt_producer" ) != 0 ) )
990 if ( well_formed
&& service
!= NULL
)
992 // Need the complete producer list for various reasons
993 properties
= context
->destructors
;
995 // Now make sure we don't have a reference to the service in the properties
996 for ( i
= mlt_properties_count( properties
) - 1; i
>= 1; i
-- )
998 char *name
= mlt_properties_get_name( properties
, i
);
999 if ( mlt_properties_get_data( properties
, name
, NULL
) == service
)
1001 mlt_properties_set_data( properties
, name
, service
, 0, NULL
, NULL
);
1006 // We are done referencing destructor property list
1007 // Set this var to service properties for convenience
1008 properties
= mlt_service_properties( service
);
1010 // make the returned service destroy the connected services
1011 mlt_properties_set_data( properties
, "__destructors__", context
->destructors
, 0, (mlt_destructor
) mlt_properties_close
, NULL
);
1013 // Now assign additional properties
1014 mlt_properties_set( properties
, "resource", filename
);
1016 // This tells consumer_westley not to deep copy
1017 mlt_properties_set( properties
, "westley", "was here" );
1021 // Return null if not well formed
1025 mlt_properties_close( context
->destructors
);
1028 free( context
->stack_service
);
1029 mlt_properties_close( context
->producer_map
);
1032 return MLT_PRODUCER( service
);