2 * consumer_westley.c -- a libxml2 serialiser 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 #include "consumer_westley.h"
22 #include <framework/mlt.h>
28 #include <libxml/tree.h>
32 // This maintains counters for adding ids to elements
33 struct serialise_context_s
35 mlt_properties id_map
;
43 mlt_properties hide_map
;
47 typedef struct serialise_context_s
* serialise_context
;
49 /** Forward references to static functions.
52 static int consumer_start( mlt_consumer parent
);
53 static int consumer_is_stopped( mlt_consumer
this );
54 static void serialise_service( serialise_context context
, mlt_service service
, xmlNode
*node
);
68 /** Create or retrieve an id associated to this service.
71 static char *westley_get_id( serialise_context context
, mlt_service service
, westley_type type
)
75 mlt_properties map
= context
->id_map
;
77 // Search the map for the service
78 for ( i
= 0; i
< mlt_properties_count( map
); i
++ )
79 if ( mlt_properties_get_data_at( map
, i
, NULL
) == service
)
82 // If the service is not in the map, and the type indicates a new id is needed...
83 if ( i
>= mlt_properties_count( map
) && type
!= westley_existing
)
85 // Attempt to reuse existing id
86 id
= mlt_properties_get( MLT_SERVICE_PROPERTIES( service
), "id" );
88 // If no id, or the id is used in the map (for another service), then
90 if ( id
== NULL
|| mlt_properties_get_data( map
, id
, NULL
) != NULL
)
97 case westley_producer
:
98 sprintf( temp
, "producer%d", context
->producer_count
++ );
100 case westley_multitrack
:
101 sprintf( temp
, "multitrack%d", context
->multitrack_count
++ );
103 case westley_playlist
:
104 sprintf( temp
, "playlist%d", context
->playlist_count
++ );
106 case westley_tractor
:
107 sprintf( temp
, "tractor%d", context
->tractor_count
++ );
110 sprintf( temp
, "filter%d", context
->filter_count
++ );
112 case westley_transition
:
113 sprintf( temp
, "transition%d", context
->transition_count
++ );
115 case westley_existing
:
120 while( mlt_properties_get_data( map
, temp
, NULL
) != NULL
);
122 // Set the data at the generated name
123 mlt_properties_set_data( map
, temp
, service
, 0, NULL
, NULL
);
125 // Get the pointer to the name (i is the end of the list)
126 id
= mlt_properties_get_name( map
, i
);
130 // Store the existing id in the map
131 mlt_properties_set_data( map
, id
, service
, 0, NULL
, NULL
);
134 else if ( type
== westley_existing
)
136 id
= mlt_properties_get_name( map
, i
);
142 /** This is what will be called by the factory - anything can be passed in
143 via the argument, but keep it simple.
146 mlt_consumer
consumer_westley_init( char *arg
)
148 // Create the consumer object
149 mlt_consumer
this = calloc( sizeof( struct mlt_consumer_s
), 1 );
151 // If no malloc'd and consumer init ok
152 if ( this != NULL
&& mlt_consumer_init( this, NULL
) == 0 )
154 // Allow thread to be started/stopped
155 this->start
= consumer_start
;
156 this->is_stopped
= consumer_is_stopped
;
158 mlt_properties_set( MLT_CONSUMER_PROPERTIES( this ), "resource", arg
);
160 // Return the consumer produced
164 // malloc or consumer init failed
171 static void serialise_properties( serialise_context context
, mlt_properties properties
, xmlNode
*node
)
176 // Enumerate the properties
177 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
179 char *name
= mlt_properties_get_name( properties
, i
);
182 mlt_properties_get_value( properties
, i
) != NULL
&&
183 strcmp( name
, "westley" ) != 0 &&
184 strcmp( name
, "in" ) != 0 &&
185 strcmp( name
, "out" ) != 0 &&
186 strcmp( name
, "id" ) != 0 &&
187 strcmp( name
, "root" ) != 0 &&
188 strcmp( name
, "width" ) != 0 &&
189 strcmp( name
, "height" ) != 0 )
191 char *value
= mlt_properties_get_value( properties
, i
);
192 p
= xmlNewChild( node
, NULL
, "property", NULL
);
193 xmlNewProp( p
, "name", mlt_properties_get_name( properties
, i
) );
194 if ( strcmp( context
->root
, "" ) && !strncmp( value
, context
->root
, strlen( context
->root
) ) )
195 xmlNodeSetContent( p
, value
+ strlen( context
->root
) + 1 );
197 xmlNodeSetContent( p
, value
);
202 static void serialise_store_properties( serialise_context context
, mlt_properties properties
, xmlNode
*node
, char *store
)
207 // Enumerate the properties
208 for ( i
= 0; store
!= NULL
&& i
< mlt_properties_count( properties
); i
++ )
210 char *name
= mlt_properties_get_name( properties
, i
);
211 if ( !strncmp( name
, store
, strlen( store
) ) )
213 char *value
= mlt_properties_get_value( properties
, i
);
216 p
= xmlNewChild( node
, NULL
, "property", NULL
);
217 xmlNewProp( p
, "name", mlt_properties_get_name( properties
, i
) );
218 if ( context
->root
!= NULL
&& strcmp( context
->root
, "" ) && !strncmp( value
, context
->root
, strlen( context
->root
) ) )
219 xmlNodeSetContent( p
, value
+ strlen( context
->root
) + 1 );
221 xmlNodeSetContent( p
, value
);
227 static inline void serialise_service_filters( serialise_context context
, mlt_service service
, xmlNode
*node
)
231 mlt_filter filter
= NULL
;
233 // Enumerate the filters
234 for ( i
= 0; ( filter
= mlt_producer_filter( MLT_PRODUCER( service
), i
) ) != NULL
; i
++ )
236 mlt_properties properties
= MLT_FILTER_PROPERTIES( filter
);
237 if ( mlt_properties_get_int( properties
, "_fezzik" ) == 0 )
239 // Get a new id - if already allocated, do nothing
240 char *id
= westley_get_id( context
, MLT_FILTER_SERVICE( filter
), westley_filter
);
243 int in
= mlt_properties_get_position( properties
, "in" );
244 int out
= mlt_properties_get_position( properties
, "out" );
245 p
= xmlNewChild( node
, NULL
, "filter", NULL
);
246 xmlNewProp( p
, "id", id
);
247 if ( in
!= 0 || out
!= 0 )
250 sprintf( temp
, "%d", in
);
251 xmlNewProp( p
, "in", temp
);
252 sprintf( temp
, "%d", out
);
253 xmlNewProp( p
, "out", temp
);
255 serialise_properties( context
, properties
, p
);
256 serialise_service_filters( context
, MLT_FILTER_SERVICE( filter
), p
);
262 static void serialise_producer( serialise_context context
, mlt_service service
, xmlNode
*node
)
264 xmlNode
*child
= node
;
265 mlt_service parent
= MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service
) ) );
267 if ( context
->pass
== 0 )
269 mlt_properties properties
= MLT_SERVICE_PROPERTIES( parent
);
270 // Get a new id - if already allocated, do nothing
271 char *id
= westley_get_id( context
, parent
, westley_producer
);
275 child
= xmlNewChild( node
, NULL
, "producer", NULL
);
278 xmlNewProp( child
, "id", id
);
279 xmlNewProp( child
, "in", mlt_properties_get( properties
, "in" ) );
280 xmlNewProp( child
, "out", mlt_properties_get( properties
, "out" ) );
281 serialise_properties( context
, properties
, child
);
282 serialise_service_filters( context
, service
, child
);
284 // Add producer to the map
285 mlt_properties_set_int( context
->hide_map
, id
, mlt_properties_get_int( properties
, "hide" ) );
289 char *id
= westley_get_id( context
, parent
, westley_existing
);
290 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
291 xmlNewProp( node
, "parent", id
);
292 xmlNewProp( node
, "in", mlt_properties_get( properties
, "in" ) );
293 xmlNewProp( node
, "out", mlt_properties_get( properties
, "out" ) );
297 static void serialise_tractor( serialise_context context
, mlt_service service
, xmlNode
*node
);
299 static void serialise_multitrack( serialise_context context
, mlt_service service
, xmlNode
*node
)
303 if ( context
->pass
== 0 )
305 // Iterate over the tracks to collect the producers
306 for ( i
= 0; i
< mlt_multitrack_count( MLT_MULTITRACK( service
) ); i
++ )
308 mlt_producer producer
= mlt_producer_cut_parent( mlt_multitrack_track( MLT_MULTITRACK( service
), i
) );
309 serialise_service( context
, MLT_SERVICE( producer
), node
);
314 // Get a new id - if already allocated, do nothing
315 char *id
= westley_get_id( context
, service
, westley_multitrack
);
319 // Serialise the tracks
320 for ( i
= 0; i
< mlt_multitrack_count( MLT_MULTITRACK( service
) ); i
++ )
322 xmlNode
*track
= xmlNewChild( node
, NULL
, "track", NULL
);
324 mlt_producer producer
= mlt_multitrack_track( MLT_MULTITRACK( service
), i
);
325 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
327 mlt_service parent
= MLT_SERVICE( mlt_producer_cut_parent( producer
) );
329 char *id
= westley_get_id( context
, MLT_SERVICE( parent
), westley_existing
);
330 xmlNewProp( track
, "producer", id
);
331 if ( mlt_producer_is_cut( producer
) )
333 xmlNewProp( track
, "in", mlt_properties_get( properties
, "in" ) );
334 xmlNewProp( track
, "out", mlt_properties_get( properties
, "out" ) );
335 serialise_store_properties( context
, MLT_PRODUCER_PROPERTIES( producer
), track
, context
->store
);
336 serialise_store_properties( context
, MLT_PRODUCER_PROPERTIES( producer
), track
, "meta." );
337 serialise_service_filters( context
, MLT_PRODUCER_SERVICE( producer
), track
);
340 hide
= mlt_properties_get_int( context
->hide_map
, id
);
342 xmlNewProp( track
, "hide", hide
== 1 ?
"video" : ( hide
== 2 ?
"audio" : "both" ) );
344 serialise_service_filters( context
, service
, node
);
348 static void serialise_playlist( serialise_context context
, mlt_service service
, xmlNode
*node
)
351 xmlNode
*child
= node
;
352 mlt_playlist_clip_info info
;
353 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
355 if ( context
->pass
== 0 )
357 // Get a new id - if already allocated, do nothing
358 char *id
= westley_get_id( context
, service
, westley_playlist
);
362 // Iterate over the playlist entries to collect the producers
363 for ( i
= 0; i
< mlt_playlist_count( MLT_PLAYLIST( service
) ); i
++ )
365 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service
), &info
, i
) )
367 if ( info
.producer
!= NULL
)
369 mlt_producer producer
= mlt_producer_cut_parent( info
.producer
);
370 char *service_s
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "mlt_service" );
371 char *resource_s
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "resource" );
372 if ( resource_s
!= NULL
&& !strcmp( resource_s
, "<playlist>" ) )
373 serialise_playlist( context
, MLT_SERVICE( producer
), node
);
374 else if ( service_s
!= NULL
&& strcmp( service_s
, "blank" ) != 0 )
375 serialise_service( context
, MLT_SERVICE( producer
), node
);
380 child
= xmlNewChild( node
, NULL
, "playlist", NULL
);
383 xmlNewProp( child
, "id", id
);
385 // Store application specific properties
386 serialise_store_properties( context
, properties
, child
, context
->store
);
387 serialise_store_properties( context
, properties
, child
, "meta." );
389 // Add producer to the map
390 mlt_properties_set_int( context
->hide_map
, id
, mlt_properties_get_int( properties
, "hide" ) );
392 // Iterate over the playlist entries
393 for ( i
= 0; i
< mlt_playlist_count( MLT_PLAYLIST( service
) ); i
++ )
395 if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service
), &info
, i
) )
397 mlt_producer producer
= mlt_producer_cut_parent( info
.producer
);
398 char *service_s
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "mlt_service" );
399 if ( service_s
!= NULL
&& strcmp( service_s
, "blank" ) == 0 )
403 xmlNode
*entry
= xmlNewChild( child
, NULL
, "blank", NULL
);
404 snprintf( length
, 19, "%d", info
.frame_count
);
405 xmlNewProp( entry
, "length", length
);
410 xmlNode
*entry
= xmlNewChild( child
, NULL
, "entry", NULL
);
411 id
= westley_get_id( context
, MLT_SERVICE( producer
), westley_existing
);
412 xmlNewProp( entry
, "producer", id
);
413 sprintf( temp
, "%d", info
.frame_in
);
414 xmlNewProp( entry
, "in", temp
);
415 sprintf( temp
, "%d", info
.frame_out
);
416 xmlNewProp( entry
, "out", temp
);
417 if ( info
.repeat
> 1 )
419 sprintf( temp
, "%d", info
.repeat
);
420 xmlNewProp( entry
, "repeat", temp
);
422 if ( mlt_producer_is_cut( info
.cut
) )
424 serialise_store_properties( context
, MLT_PRODUCER_PROPERTIES( info
.cut
), entry
, context
->store
);
425 serialise_store_properties( context
, MLT_PRODUCER_PROPERTIES( info
.cut
), entry
, "meta." );
426 serialise_service_filters( context
, MLT_PRODUCER_SERVICE( info
.cut
), entry
);
432 serialise_service_filters( context
, service
, child
);
434 else if ( strcmp( (const char*) node
->name
, "tractor" ) != 0 )
436 char *id
= westley_get_id( context
, service
, westley_existing
);
437 xmlNewProp( node
, "producer", id
);
441 static void serialise_tractor( serialise_context context
, mlt_service service
, xmlNode
*node
)
443 xmlNode
*child
= node
;
444 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
446 if ( context
->pass
== 0 )
448 // Recurse on connected producer
449 serialise_service( context
, mlt_service_producer( service
), node
);
453 // Get a new id - if already allocated, do nothing
454 char *id
= westley_get_id( context
, service
, westley_tractor
);
458 child
= xmlNewChild( node
, NULL
, "tractor", NULL
);
461 xmlNewProp( child
, "id", id
);
462 xmlNewProp( child
, "in", mlt_properties_get( properties
, "in" ) );
463 xmlNewProp( child
, "out", mlt_properties_get( properties
, "out" ) );
465 // Store application specific properties
466 serialise_store_properties( context
, MLT_SERVICE_PROPERTIES( service
), child
, context
->store
);
467 serialise_store_properties( context
, MLT_SERVICE_PROPERTIES( service
), child
, "meta." );
469 // Recurse on connected producer
470 serialise_service( context
, mlt_service_producer( service
), child
);
471 serialise_service_filters( context
, service
, child
);
475 static void serialise_filter( serialise_context context
, mlt_service service
, xmlNode
*node
)
477 xmlNode
*child
= node
;
478 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
480 // Recurse on connected producer
481 serialise_service( context
, mlt_service_producer( service
), node
);
483 if ( context
->pass
== 1 )
485 // Get a new id - if already allocated, do nothing
486 char *id
= westley_get_id( context
, service
, westley_filter
);
490 child
= xmlNewChild( node
, NULL
, "filter", NULL
);
493 xmlNewProp( child
, "id", id
);
494 xmlNewProp( child
, "in", mlt_properties_get( properties
, "in" ) );
495 xmlNewProp( child
, "out", mlt_properties_get( properties
, "out" ) );
497 serialise_properties( context
, properties
, child
);
498 serialise_service_filters( context
, service
, child
);
502 static void serialise_transition( serialise_context context
, mlt_service service
, xmlNode
*node
)
504 xmlNode
*child
= node
;
505 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
507 // Recurse on connected producer
508 serialise_service( context
, MLT_SERVICE( MLT_TRANSITION( service
)->producer
), node
);
510 if ( context
->pass
== 1 )
512 // Get a new id - if already allocated, do nothing
513 char *id
= westley_get_id( context
, service
, westley_transition
);
517 child
= xmlNewChild( node
, NULL
, "transition", NULL
);
520 xmlNewProp( child
, "id", id
);
521 xmlNewProp( child
, "in", mlt_properties_get( properties
, "in" ) );
522 xmlNewProp( child
, "out", mlt_properties_get( properties
, "out" ) );
524 serialise_properties( context
, properties
, child
);
525 serialise_service_filters( context
, service
, child
);
529 static void serialise_service( serialise_context context
, mlt_service service
, xmlNode
*node
)
531 // Iterate over consumer/producer connections
532 while ( service
!= NULL
)
534 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
535 char *mlt_type
= mlt_properties_get( properties
, "mlt_type" );
537 // Tell about the producer
538 if ( strcmp( mlt_type
, "producer" ) == 0 )
540 char *mlt_service
= mlt_properties_get( properties
, "mlt_service" );
541 if ( mlt_properties_get( properties
, "westley" ) == NULL
&& !strcmp( mlt_service
, "tractor" ) )
544 serialise_tractor( context
, service
, node
);
546 serialise_tractor( context
, service
, node
);
552 serialise_producer( context
, service
, node
);
554 if ( mlt_properties_get( properties
, "westley" ) != NULL
)
558 // Tell about the framework container producers
559 else if ( strcmp( mlt_type
, "mlt_producer" ) == 0 )
561 char *resource
= mlt_properties_get( properties
, "resource" );
563 // Recurse on multitrack's tracks
564 if ( strcmp( resource
, "<multitrack>" ) == 0 )
566 serialise_multitrack( context
, service
, node
);
570 // Recurse on playlist's clips
571 else if ( strcmp( resource
, "<playlist>" ) == 0 )
573 serialise_playlist( context
, service
, node
);
576 // Recurse on tractor's producer
577 else if ( strcmp( resource
, "<tractor>" ) == 0 )
580 serialise_tractor( context
, service
, node
);
582 serialise_tractor( context
, service
, node
);
587 // Treat it as a normal producer
590 serialise_producer( context
, service
, node
);
594 // Tell about a filter
595 else if ( strcmp( mlt_type
, "filter" ) == 0 )
597 serialise_filter( context
, service
, node
);
601 // Tell about a transition
602 else if ( strcmp( mlt_type
, "transition" ) == 0 )
604 serialise_transition( context
, service
, node
);
608 // Get the next connected service
609 service
= mlt_service_producer( service
);
613 xmlDocPtr
westley_make_doc( mlt_consumer consumer
, mlt_service service
)
615 mlt_properties properties
= MLT_SERVICE_PROPERTIES( service
);
616 xmlDocPtr doc
= xmlNewDoc( "1.0" );
617 xmlNodePtr root
= xmlNewNode( NULL
, "westley" );
618 struct serialise_context_s
*context
= calloc( 1, sizeof( struct serialise_context_s
) );
620 xmlDocSetRootElement( doc
, root
);
622 // If we have root, then deal with it now
623 if ( mlt_properties_get( properties
, "root" ) != NULL
)
625 xmlNewProp( root
, "root", mlt_properties_get( properties
, "root" ) );
626 context
->root
= strdup( mlt_properties_get( properties
, "root" ) );
630 context
->root
= strdup( "" );
633 // Assign the additional 'storage' pattern for properties
634 context
->store
= mlt_properties_get( MLT_CONSUMER_PROPERTIES( consumer
), "store" );
636 // Assign a title property
637 if ( mlt_properties_get( properties
, "title" ) != NULL
)
638 xmlNewProp( root
, "title", mlt_properties_get( properties
, "title" ) );
640 // Construct the context maps
641 context
->id_map
= mlt_properties_new();
642 context
->hide_map
= mlt_properties_new();
644 // Ensure producer is a framework producer
645 mlt_properties_set( MLT_SERVICE_PROPERTIES( service
), "mlt_type", "mlt_producer" );
647 // In pass one, we serialise the end producers and playlists,
648 // adding them to a map keyed by address.
649 serialise_service( context
, service
, root
);
651 // In pass two, we serialise the tractor and reference the
652 // producers and playlists
654 serialise_service( context
, service
, root
);
657 mlt_properties_close( context
->id_map
);
658 mlt_properties_close( context
->hide_map
);
659 free( context
->root
);
665 static int consumer_start( mlt_consumer
this )
667 xmlDocPtr doc
= NULL
;
669 // Get the producer service
670 mlt_service service
= mlt_service_producer( MLT_CONSUMER_SERVICE( this ) );
671 if ( service
!= NULL
)
673 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
674 char *resource
= mlt_properties_get( properties
, "resource" );
676 // Set the title if provided
677 if ( mlt_properties_get( properties
, "title" ) )
678 mlt_properties_set( MLT_SERVICE_PROPERTIES( service
), "title", mlt_properties_get( properties
, "title" ) );
679 else if ( mlt_properties_get( MLT_SERVICE_PROPERTIES( service
), "title" ) == NULL
)
680 mlt_properties_set( MLT_SERVICE_PROPERTIES( service
), "title", "Anonymous Submission" );
682 // Check for a root on the consumer properties and pass to service
683 if ( mlt_properties_get( properties
, "root" ) )
684 mlt_properties_set( MLT_SERVICE_PROPERTIES( service
), "root", mlt_properties_get( properties
, "root" ) );
686 // Specify roots in other cases...
687 if ( resource
!= NULL
&& mlt_properties_get( properties
, "root" ) == NULL
)
689 // Get the current working directory
690 char *cwd
= getcwd( NULL
, 0 );
691 mlt_properties_set( MLT_SERVICE_PROPERTIES( service
), "root", cwd
);
696 doc
= westley_make_doc( this, service
);
699 if ( resource
== NULL
|| !strcmp( resource
, "" ) )
701 xmlDocFormatDump( stdout
, doc
, 1 );
703 else if ( strchr( resource
, '.' ) == NULL
)
705 xmlChar
*buffer
= NULL
;
707 xmlDocDumpMemory( doc
, &buffer
, &length
);
708 mlt_properties_set( properties
, resource
, buffer
);
713 xmlSaveFormatFile( resource
, doc
, 1 );
716 // Close the document
720 mlt_consumer_stop( this );
722 mlt_consumer_stopped( this );
727 static int consumer_is_stopped( mlt_consumer
this )