2 * mlt_producer.c -- abstraction for all producer services
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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.
22 #include "mlt_producer.h"
23 #include "mlt_factory.h"
24 #include "mlt_frame.h"
25 #include "mlt_parser.h"
31 /** Forward references.
34 static int producer_get_frame( mlt_service
this, mlt_frame_ptr frame
, int index
);
35 static void mlt_producer_property_changed( mlt_service owner
, mlt_producer
this, char *name
);
36 static void mlt_producer_service_changed( mlt_service owner
, mlt_producer
this );
38 //#define _MLT_PRODUCER_CHECKS_ 1
40 #ifdef _MLT_PRODUCER_CHECKS_
41 static int producers_created
= 0;
42 static int producers_destroyed
= 0;
48 int mlt_producer_init( mlt_producer
this, void *child
)
50 // Check that we haven't received NULL
51 int error
= this == NULL
;
53 // Continue if no error
56 #ifdef _MLT_PRODUCER_CHECKS_
60 // Initialise the producer
61 memset( this, 0, sizeof( struct mlt_producer_s
) );
63 // Associate with the child
66 // Initialise the service
67 if ( mlt_service_init( &this->parent
, this ) == 0 )
69 // Get the normalisation preference
70 char *normalisation
= mlt_environment( "MLT_NORMALISATION" );
72 // The parent is the service
73 mlt_service parent
= &this->parent
;
75 // Define the parent close
76 parent
->close
= ( mlt_destructor
)mlt_producer_close
;
77 parent
->close_object
= this;
79 // For convenience, we'll assume the close_object is this
80 this->close_object
= this;
82 // Get the properties of the parent
83 mlt_properties properties
= MLT_SERVICE_PROPERTIES( parent
);
85 // Set the default properties
86 mlt_properties_set( properties
, "mlt_type", "mlt_producer" );
87 mlt_properties_set_position( properties
, "_position", 0.0 );
88 mlt_properties_set_double( properties
, "_frame", 0 );
89 if ( normalisation
== NULL
|| strcmp( normalisation
, "NTSC" ) )
91 mlt_properties_set_double( properties
, "fps", 25.0 );
92 mlt_properties_set_double( properties
, "aspect_ratio", 59.0 / 54.0 );
96 mlt_properties_set_double( properties
, "fps", 30000.0 / 1001.0 );
97 mlt_properties_set_double( properties
, "aspect_ratio", 10.0 / 11.0 );
99 mlt_properties_set_double( properties
, "_speed", 1.0 );
100 mlt_properties_set_position( properties
, "in", 0 );
101 mlt_properties_set_position( properties
, "out", 14999 );
102 mlt_properties_set_position( properties
, "length", 15000 );
103 mlt_properties_set( properties
, "eof", "pause" );
104 mlt_properties_set( properties
, "resource", "<producer>" );
106 // Override service get_frame
107 parent
->get_frame
= producer_get_frame
;
109 mlt_events_listen( properties
, this, "service-changed", ( mlt_listener
)mlt_producer_service_changed
);
110 mlt_events_listen( properties
, this, "property-changed", ( mlt_listener
)mlt_producer_property_changed
);
111 mlt_events_register( properties
, "producer-changed", NULL
);
118 /** Listener for property changes.
121 static void mlt_producer_property_changed( mlt_service owner
, mlt_producer
this, char *name
)
123 if ( !strcmp( name
, "in" ) || !strcmp( name
, "out" ) || !strcmp( name
, "length" ) )
124 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL
);
127 /** Listener for service changes.
130 static void mlt_producer_service_changed( mlt_service owner
, mlt_producer
this )
132 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL
);
135 /** Create a new producer.
138 mlt_producer
mlt_producer_new( )
140 mlt_producer
this = malloc( sizeof( struct mlt_producer_s
) );
141 mlt_producer_init( this, NULL
);
145 /** Determine if producer is a cut.
148 int mlt_producer_is_cut( mlt_producer
this )
150 return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
153 /** Determine if producer is a mix.
156 int mlt_producer_is_mix( mlt_producer
this )
158 mlt_properties properties
= this != NULL ?
MLT_PRODUCER_PROPERTIES( this ) : NULL
;
159 mlt_tractor tractor
= properties
!= NULL ?
mlt_properties_get_data( properties
, "mlt_mix", NULL
) : NULL
;
160 return tractor
!= NULL
;
163 /** Determine if the producer is a blank [from a playlist].
166 int mlt_producer_is_blank( mlt_producer
this )
168 return this == NULL
|| !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
171 /** Obtain the parent producer.
174 mlt_producer
mlt_producer_cut_parent( mlt_producer
this )
176 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
177 if ( mlt_producer_is_cut( this ) )
178 return mlt_properties_get_data( properties
, "_cut_parent", NULL
);
183 /** Create a cut of this producer
186 mlt_producer
mlt_producer_cut( mlt_producer
this, int in
, int out
)
188 mlt_producer result
= mlt_producer_new( );
189 mlt_producer parent
= mlt_producer_cut_parent( this );
190 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( result
);
191 mlt_properties parent_props
= MLT_PRODUCER_PROPERTIES( parent
);
193 mlt_events_block( MLT_PRODUCER_PROPERTIES( result
), MLT_PRODUCER_PROPERTIES( result
) );
194 // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
197 if ( ( out
< 0 || out
>= mlt_producer_get_playtime( parent
) ) && !mlt_producer_is_blank( this ) )
198 out
= mlt_producer_get_playtime( parent
) - 1;
200 mlt_properties_inc_ref( parent_props
);
201 mlt_properties_set_int( properties
, "_cut", 1 );
202 mlt_properties_set_data( properties
, "_cut_parent", parent
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
203 mlt_properties_set_position( properties
, "length", mlt_properties_get_position( parent_props
, "length" ) );
204 mlt_producer_set_in_and_out( result
, in
, out
);
207 mlt_filter filter
= mlt_factory_filter( "data_feed", "attr_check" );
208 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter
), "_fezzik", 1 );
209 mlt_producer_attach( result
, filter
);
210 mlt_filter_close( filter
);
211 mlt_events_unblock( MLT_PRODUCER_PROPERTIES( result
), MLT_PRODUCER_PROPERTIES( result
) );
216 /** Get the parent service object.
219 mlt_service
mlt_producer_service( mlt_producer
this )
221 return this != NULL ?
&this->parent
: NULL
;
224 /** Get the producer properties.
227 mlt_properties
mlt_producer_properties( mlt_producer
this )
229 return MLT_SERVICE_PROPERTIES( &this->parent
);
232 /** Seek to a specified position.
235 int mlt_producer_seek( mlt_producer
this, mlt_position position
)
237 // Determine eof handling
238 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
239 char *eof
= mlt_properties_get( properties
, "eof" );
240 int use_points
= 1 - mlt_properties_get_int( properties
, "ignore_points" );
242 // Recursive behaviour for cuts - repositions parent and then repositions cut
243 // hence no return on this condition
244 if ( mlt_producer_is_cut( this ) )
245 mlt_producer_seek( mlt_producer_cut_parent( this ), position
+ mlt_producer_get_in( this ) );
252 else if ( use_points
&& !strcmp( eof
, "pause" ) && position
>= mlt_producer_get_playtime( this ) )
254 mlt_producer_set_speed( this, 0 );
255 position
= mlt_producer_get_playtime( this ) - 1;
257 else if ( use_points
&& !strcmp( eof
, "loop" ) && position
>= mlt_producer_get_playtime( this ) )
259 position
= position
% mlt_producer_get_playtime( this );
263 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position
);
265 // Calculate the absolute frame
266 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points
* mlt_producer_get_in( this ) + position
);
271 /** Get the current position (relative to in point).
274 mlt_position
mlt_producer_position( mlt_producer
this )
276 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
279 /** Get the current position (relative to start of producer).
282 mlt_position
mlt_producer_frame( mlt_producer
this )
284 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
287 /** Set the playing speed.
290 int mlt_producer_set_speed( mlt_producer
this, double speed
)
292 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed
);
295 /** Get the playing speed.
298 double mlt_producer_get_speed( mlt_producer
this )
300 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
303 /** Get the frames per second.
306 double mlt_producer_get_fps( mlt_producer
this )
308 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "fps" );
311 /** Set the in and out points.
314 int mlt_producer_set_in_and_out( mlt_producer
this, mlt_position in
, mlt_position out
)
316 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
318 // Correct ins and outs if necessary
321 else if ( in
>= mlt_producer_get_length( this ) )
322 in
= mlt_producer_get_length( this ) - 1;
326 else if ( out
>= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
327 out
= mlt_producer_get_length( this ) - 1;
328 else if ( out
>= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
329 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out
+ 1 );
331 // Swap ins and outs if wrong
340 mlt_events_block( properties
, properties
);
341 mlt_properties_set_position( properties
, "in", in
);
342 mlt_events_unblock( properties
, properties
);
343 mlt_properties_set_position( properties
, "out", out
);
348 /** Physically reduce the producer (typically a cut) to a 0 length.
349 Essentially, all 0 length cuts should be immediately removed by containers.
352 int mlt_producer_clear( mlt_producer
this )
356 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
357 mlt_events_block( properties
, properties
);
358 mlt_properties_set_position( properties
, "in", 0 );
359 mlt_events_unblock( properties
, properties
);
360 mlt_properties_set_position( properties
, "out", -1 );
365 /** Get the in point.
368 mlt_position
mlt_producer_get_in( mlt_producer
this )
370 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
373 /** Get the out point.
376 mlt_position
mlt_producer_get_out( mlt_producer
this )
378 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
381 /** Get the total play time.
384 mlt_position
mlt_producer_get_playtime( mlt_producer
this )
386 return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
389 /** Get the total length of the producer.
392 mlt_position
mlt_producer_get_length( mlt_producer
this )
394 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
397 /** Prepare for next frame.
400 void mlt_producer_prepare_next( mlt_producer
this )
402 mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
408 static int producer_get_frame( mlt_service service
, mlt_frame_ptr frame
, int index
)
411 mlt_producer
this = service
!= NULL ? service
->child
: NULL
;
413 if ( this != NULL
&& !mlt_producer_is_cut( this ) )
415 // Get the properties of this producer
416 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
418 // Determine eof handling
419 char *eof
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
421 // Get the speed of the producer
422 double speed
= mlt_producer_get_speed( this );
424 // We need to use the clone if it's specified
425 mlt_producer clone
= mlt_properties_get_data( properties
, "use_clone", NULL
);
427 // If no clone is specified, use this
428 clone
= clone
== NULL ?
this : clone
;
430 // A properly instatiated producer will have a get_frame method...
431 if ( this->get_frame
== NULL
|| ( !strcmp( eof
, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
433 // Generate a test frame
434 *frame
= mlt_frame_init( );
437 result
= mlt_frame_set_position( *frame
, mlt_producer_position( this ) );
439 // Mark as a test card
440 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_image", 1 );
441 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_audio", 1 );
443 // Calculate the next position
444 mlt_producer_prepare_next( this );
448 // Get the frame from the implementation
449 result
= this->get_frame( clone
, frame
, index
);
452 // Copy the fps and speed of the producer onto the frame
453 properties
= MLT_FRAME_PROPERTIES( *frame
);
454 mlt_properties_set_double( properties
, "_speed", speed
);
455 mlt_properties_set_double( properties
, "fps", mlt_producer_get_fps( this ) );
456 mlt_properties_set_int( properties
, "test_audio", mlt_frame_is_test_audio( *frame
) );
457 mlt_properties_set_int( properties
, "test_image", mlt_frame_is_test_card( *frame
) );
458 if ( mlt_properties_get_data( properties
, "_producer", NULL
) == NULL
)
459 mlt_properties_set_data( properties
, "_producer", service
, 0, NULL
, NULL
);
461 else if ( this != NULL
)
463 // Get the speed of the cut
464 double speed
= mlt_producer_get_speed( this );
466 // Get the parent of this cut
467 mlt_producer parent
= mlt_producer_cut_parent( this );
469 // Get the properties of the parent
470 mlt_properties parent_properties
= MLT_PRODUCER_PROPERTIES( parent
);
472 // Get the properties of the cut
473 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
475 // Determine the clone index
476 int clone_index
= mlt_properties_get_int( properties
, "_clone" );
478 // Determine the clone to use
479 mlt_producer clone
= this;
481 if ( clone_index
> 0 )
484 sprintf( key
, "_clone.%d", clone_index
- 1 );
485 clone
= mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), key
, NULL
);
486 if ( clone
== NULL
) fprintf( stderr
, "requested clone doesn't exist %d\n", clone_index
);
487 clone
= clone
== NULL ?
this : clone
;
494 // We need to seek to the correct position in the clone
495 mlt_producer_seek( clone
, mlt_producer_get_in( this ) + mlt_properties_get_int( properties
, "_position" ) );
497 // Assign the clone property to the parent
498 mlt_properties_set_data( parent_properties
, "use_clone", clone
, 0, NULL
, NULL
);
500 // Now get the frame from the parents service
501 result
= mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent
), frame
, index
);
503 // We're done with the clone now
504 mlt_properties_set_data( parent_properties
, "use_clone", NULL
, 0, NULL
, NULL
);
506 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame
), "_speed", speed
);
507 mlt_producer_prepare_next( this );
511 *frame
= mlt_frame_init( );
515 // Pass on all meta properties from the producer/cut on to the frame
516 if ( *frame
!= NULL
&& this != NULL
)
519 mlt_properties p_props
= MLT_PRODUCER_PROPERTIES( this );
520 mlt_properties f_props
= MLT_FRAME_PROPERTIES( *frame
);
521 int count
= mlt_properties_count( p_props
);
522 for ( i
= 0; i
< count
; i
++ )
524 char *name
= mlt_properties_get_name( p_props
, i
);
525 if ( !strncmp( name
, "meta.", 5 ) )
526 mlt_properties_set( f_props
, name
, mlt_properties_get( p_props
, name
) );
536 int mlt_producer_attach( mlt_producer
this, mlt_filter filter
)
538 return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter
);
544 int mlt_producer_detach( mlt_producer
this, mlt_filter filter
)
546 return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter
);
549 /** Retrieve a filter.
552 mlt_filter
mlt_producer_filter( mlt_producer
this, int index
)
554 return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index
);
557 /** Clone this producer.
560 static mlt_producer
mlt_producer_clone( mlt_producer
this )
562 mlt_producer clone
= NULL
;
563 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
564 char *resource
= mlt_properties_get( properties
, "resource" );
565 char *service
= mlt_properties_get( properties
, "mlt_service" );
567 mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
569 if ( service
!= NULL
)
570 clone
= mlt_factory_producer( service
, resource
);
572 if ( clone
== NULL
&& resource
!= NULL
)
573 clone
= mlt_factory_producer( "fezzik", resource
);
576 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone
), properties
);
578 mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
586 static void mlt_producer_set_clones( mlt_producer
this, int clones
)
588 mlt_producer parent
= mlt_producer_cut_parent( this );
589 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( parent
);
590 int existing
= mlt_properties_get_int( properties
, "_clones" );
594 // If the number of existing clones is different, then create/remove as necessary
595 if ( existing
!= clones
)
597 if ( existing
< clones
)
599 for ( i
= existing
; i
< clones
; i
++ )
601 mlt_producer clone
= mlt_producer_clone( parent
);
602 sprintf( key
, "_clone.%d", i
);
603 mlt_properties_set_data( properties
, key
, clone
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
608 for ( i
= clones
; i
< existing
; i
++ )
610 sprintf( key
, "_clone.%d", i
);
611 mlt_properties_set_data( properties
, key
, NULL
, 0, NULL
, NULL
);
616 // Ensure all properties on the parent are passed to the clones
617 for ( i
= 0; i
< clones
; i
++ )
619 mlt_producer clone
= NULL
;
620 sprintf( key
, "_clone.%d", i
);
621 clone
= mlt_properties_get_data( properties
, key
, NULL
);
623 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone
), properties
, "" );
626 // Update the number of clones on the properties
627 mlt_properties_set_int( properties
, "_clones", clones
);
630 /** Optimise for overlapping cuts from the same clip.
651 static int intersect( clip_references
*a
, clip_references
*b
)
653 int diff
= ( a
->start
- b
->start
) + ( a
->end
- b
->end
);
654 return diff
>= 0 && diff
< ( a
->end
- a
->start
+ 1 );
657 static int push( mlt_parser
this, int multitrack
, int track
, int position
)
659 mlt_properties properties
= mlt_parser_properties( this );
660 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
661 track_info
*info
= malloc( sizeof( track_info
) );
662 info
->multitrack
= multitrack
;
664 info
->position
= position
;
667 return mlt_deque_push_back( stack
, info
);
670 static track_info
*pop( mlt_parser
this )
672 mlt_properties properties
= mlt_parser_properties( this );
673 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
674 return mlt_deque_pop_back( stack
);
677 static track_info
*peek( mlt_parser
this )
679 mlt_properties properties
= mlt_parser_properties( this );
680 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
681 return mlt_deque_peek_back( stack
);
684 static int on_start_multitrack( mlt_parser
this, mlt_multitrack object
)
686 track_info
*info
= peek( this );
687 return push( this, info
->multitrack
++, info
->track
, info
->position
);
690 static int on_start_track( mlt_parser
this )
692 track_info
*info
= peek( this );
693 info
->position
-= info
->offset
;
694 info
->length
-= info
->offset
;
695 return push( this, info
->multitrack
, info
->track
++, info
->position
);
698 static int on_start_producer( mlt_parser
this, mlt_producer object
)
700 mlt_properties properties
= mlt_parser_properties( this );
701 mlt_properties producers
= mlt_properties_get_data( properties
, "producers", NULL
);
702 mlt_producer parent
= mlt_producer_cut_parent( object
);
703 if ( mlt_service_identify( ( mlt_service
)mlt_producer_cut_parent( object
) ) == producer_type
&& mlt_producer_is_cut( object
) )
706 clip_references
*old_refs
= NULL
;
707 clip_references
*refs
= NULL
;
710 track_info
*info
= peek( this );
711 sprintf( key
, "%p", parent
);
712 mlt_properties_get_data( producers
, key
, &count
);
713 mlt_properties_set_data( producers
, key
, parent
, ++ count
, NULL
, NULL
);
714 old_refs
= mlt_properties_get_data( properties
, key
, &ref_count
);
715 refs
= malloc( ( ref_count
+ 1 ) * sizeof( clip_references
) );
716 if ( old_refs
!= NULL
)
717 memcpy( refs
, old_refs
, ref_count
* sizeof( clip_references
) );
718 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object
), "_clone", -1 );
719 refs
[ ref_count
].cut
= object
;
720 refs
[ ref_count
].start
= info
->position
;
721 refs
[ ref_count
].end
= info
->position
+ mlt_producer_get_playtime( object
) - 1;
722 mlt_properties_set_data( properties
, key
, refs
, ++ ref_count
, free
, NULL
);
723 info
->position
+= mlt_producer_get_playtime( object
);
724 info
->length
+= mlt_producer_get_playtime( object
);
729 static int on_end_track( mlt_parser
this )
731 track_info
*track
= pop( this );
732 track_info
*multi
= peek( this );
733 multi
->length
+= track
->length
;
734 multi
->position
+= track
->length
;
735 multi
->offset
= track
->length
;
740 static int on_end_multitrack( mlt_parser
this, mlt_multitrack object
)
742 track_info
*multi
= pop( this );
743 track_info
*track
= peek( this );
744 track
->position
+= multi
->length
;
745 track
->length
+= multi
->length
;
750 int mlt_producer_optimise( mlt_producer
this )
753 mlt_parser parser
= mlt_parser_new( );
754 if ( parser
!= NULL
)
756 int i
= 0, j
= 0, k
= 0;
757 mlt_properties properties
= mlt_parser_properties( parser
);
758 mlt_properties producers
= mlt_properties_new( );
759 mlt_deque stack
= mlt_deque_init( );
760 mlt_properties_set_data( properties
, "producers", producers
, 0, ( mlt_destructor
)mlt_properties_close
, NULL
);
761 mlt_properties_set_data( properties
, "stack", stack
, 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
762 parser
->on_start_producer
= on_start_producer
;
763 parser
->on_start_track
= on_start_track
;
764 parser
->on_end_track
= on_end_track
;
765 parser
->on_start_multitrack
= on_start_multitrack
;
766 parser
->on_end_multitrack
= on_end_multitrack
;
767 push( parser
, 0, 0, 0 );
768 mlt_parser_start( parser
, MLT_PRODUCER_SERVICE( this ) );
769 free( pop( parser
) );
770 for ( k
= 0; k
< mlt_properties_count( producers
); k
++ )
772 char *name
= mlt_properties_get_name( producers
, k
);
776 mlt_producer producer
= mlt_properties_get_data( producers
, name
, &count
);
777 if ( producer
!= NULL
&& count
> 1 )
779 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
780 for ( i
= 0; i
< count
; i
++ )
783 for ( j
= i
+ 1; j
< count
; j
++ )
785 if ( intersect( &refs
[ i
], &refs
[ j
] ) )
788 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs
[ j
].cut
), "_clone", clones
);
791 if ( clones
> max_clones
)
795 for ( i
= 0; i
< count
; i
++ )
797 mlt_producer cut
= refs
[ i
].cut
;
798 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone" ) == -1 )
799 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
802 mlt_producer_set_clones( producer
, max_clones
);
804 else if ( producer
!= NULL
)
806 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
807 for ( i
= 0; i
< count
; i
++ )
809 mlt_producer cut
= refs
[ i
].cut
;
810 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
812 mlt_producer_set_clones( producer
, 0 );
815 mlt_parser_close( parser
);
820 /** Close the producer.
823 void mlt_producer_close( mlt_producer
this )
825 if ( this != NULL
&& mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
827 this->parent
.close
= NULL
;
829 if ( this->close
!= NULL
)
831 this->close( this->close_object
);
835 #if _MLT_PRODUCER_CHECKS_ == 1
837 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr
);
840 #ifdef _MLT_PRODUCER_CHECKS_
841 // Increment destroyed count
842 producers_destroyed
++;
844 // Show current stats - these should match when the app is closed
845 fprintf( stderr
, "Producers created %d, destroyed %d\n", producers_created
, producers_destroyed
);
848 mlt_service_close( &this->parent
);