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 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.
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.
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
21 #include "mlt_producer.h"
22 #include "mlt_factory.h"
23 #include "mlt_frame.h"
24 #include "mlt_parser.h"
25 #include "mlt_profile.h"
32 /** Forward references.
35 static int producer_get_frame( mlt_service
this, mlt_frame_ptr frame
, int index
);
36 static void mlt_producer_property_changed( mlt_service owner
, mlt_producer
this, char *name
);
37 static void mlt_producer_service_changed( mlt_service owner
, mlt_producer
this );
39 //#define _MLT_PRODUCER_CHECKS_ 1
41 #ifdef _MLT_PRODUCER_CHECKS_
42 static int producers_created
= 0;
43 static int producers_destroyed
= 0;
49 int mlt_producer_init( mlt_producer
this, void *child
)
51 // Check that we haven't received NULL
52 int error
= this == NULL
;
54 // Continue if no error
57 #ifdef _MLT_PRODUCER_CHECKS_
61 // Initialise the producer
62 memset( this, 0, sizeof( struct mlt_producer_s
) );
64 // Associate with the child
67 // Initialise the service
68 if ( mlt_service_init( &this->parent
, this ) == 0 )
70 // The parent is the service
71 mlt_service parent
= &this->parent
;
73 // Define the parent close
74 parent
->close
= ( mlt_destructor
)mlt_producer_close
;
75 parent
->close_object
= this;
77 // For convenience, we'll assume the close_object is this
78 this->close_object
= this;
80 // Get the properties of the parent
81 mlt_properties properties
= MLT_SERVICE_PROPERTIES( parent
);
83 // Set the default properties
84 mlt_properties_set( properties
, "mlt_type", "mlt_producer" );
85 mlt_properties_set_position( properties
, "_position", 0.0 );
86 mlt_properties_set_double( properties
, "_frame", 0 );
87 mlt_properties_set_double( properties
, "aspect_ratio", mlt_profile_sar( NULL
) );
88 mlt_properties_set_double( properties
, "_speed", 1.0 );
89 mlt_properties_set_position( properties
, "in", 0 );
90 mlt_properties_set_position( properties
, "out", 14999 );
91 mlt_properties_set_position( properties
, "length", 15000 );
92 mlt_properties_set( properties
, "eof", "pause" );
93 mlt_properties_set( properties
, "resource", "<producer>" );
95 // Override service get_frame
96 parent
->get_frame
= producer_get_frame
;
98 mlt_events_listen( properties
, this, "service-changed", ( mlt_listener
)mlt_producer_service_changed
);
99 mlt_events_listen( properties
, this, "property-changed", ( mlt_listener
)mlt_producer_property_changed
);
100 mlt_events_register( properties
, "producer-changed", NULL
);
107 /** Listener for property changes.
110 static void mlt_producer_property_changed( mlt_service owner
, mlt_producer
this, char *name
)
112 if ( !strcmp( name
, "in" ) || !strcmp( name
, "out" ) || !strcmp( name
, "length" ) )
113 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL
);
116 /** Listener for service changes.
119 static void mlt_producer_service_changed( mlt_service owner
, mlt_producer
this )
121 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL
);
124 /** Create a new producer.
127 mlt_producer
mlt_producer_new( )
129 mlt_producer
this = malloc( sizeof( struct mlt_producer_s
) );
130 mlt_producer_init( this, NULL
);
134 /** Determine if producer is a cut.
137 int mlt_producer_is_cut( mlt_producer
this )
139 return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
142 /** Determine if producer is a mix.
145 int mlt_producer_is_mix( mlt_producer
this )
147 mlt_properties properties
= this != NULL ?
MLT_PRODUCER_PROPERTIES( this ) : NULL
;
148 mlt_tractor tractor
= properties
!= NULL ?
mlt_properties_get_data( properties
, "mlt_mix", NULL
) : NULL
;
149 return tractor
!= NULL
;
152 /** Determine if the producer is a blank [from a playlist].
155 int mlt_producer_is_blank( mlt_producer
this )
157 return this == NULL
|| !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
160 /** Obtain the parent producer.
163 mlt_producer
mlt_producer_cut_parent( mlt_producer
this )
165 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
166 if ( mlt_producer_is_cut( this ) )
167 return mlt_properties_get_data( properties
, "_cut_parent", NULL
);
172 /** Create a cut of this producer
175 mlt_producer
mlt_producer_cut( mlt_producer
this, int in
, int out
)
177 mlt_producer result
= mlt_producer_new( );
178 mlt_producer parent
= mlt_producer_cut_parent( this );
179 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( result
);
180 mlt_properties parent_props
= MLT_PRODUCER_PROPERTIES( parent
);
182 mlt_events_block( MLT_PRODUCER_PROPERTIES( result
), MLT_PRODUCER_PROPERTIES( result
) );
183 // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
186 if ( ( out
< 0 || out
>= mlt_producer_get_length( parent
) ) && !mlt_producer_is_blank( this ) )
187 out
= mlt_producer_get_length( parent
) - 1;
189 mlt_properties_inc_ref( parent_props
);
190 mlt_properties_set_int( properties
, "_cut", 1 );
191 mlt_properties_set_data( properties
, "_cut_parent", parent
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
192 mlt_properties_set_position( properties
, "length", mlt_properties_get_position( parent_props
, "length" ) );
193 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( parent_props
, "aspect_ratio" ) );
194 mlt_producer_set_in_and_out( result
, in
, out
);
199 /** Get the parent service object.
202 mlt_service
mlt_producer_service( mlt_producer
this )
204 return this != NULL ?
&this->parent
: NULL
;
207 /** Get the producer properties.
210 mlt_properties
mlt_producer_properties( mlt_producer
this )
212 return MLT_SERVICE_PROPERTIES( &this->parent
);
215 /** Seek to a specified position.
218 int mlt_producer_seek( mlt_producer
this, mlt_position position
)
220 // Determine eof handling
221 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
222 char *eof
= mlt_properties_get( properties
, "eof" );
223 int use_points
= 1 - mlt_properties_get_int( properties
, "ignore_points" );
225 // Recursive behaviour for cuts - repositions parent and then repositions cut
226 // hence no return on this condition
227 if ( mlt_producer_is_cut( this ) )
228 mlt_producer_seek( mlt_producer_cut_parent( this ), position
+ mlt_producer_get_in( this ) );
231 if ( position
< 0 || mlt_producer_get_playtime( this ) == 0 )
235 else if ( use_points
&& ( eof
== NULL
|| !strcmp( eof
, "pause" ) ) && position
>= mlt_producer_get_playtime( this ) )
237 mlt_producer_set_speed( this, 0 );
238 position
= mlt_producer_get_playtime( this ) - 1;
240 else if ( use_points
&& !strcmp( eof
, "loop" ) && position
>= mlt_producer_get_playtime( this ) )
242 position
= (int)position
% (int)mlt_producer_get_playtime( this );
246 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position
);
248 // Calculate the absolute frame
249 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points
* mlt_producer_get_in( this ) + position
);
254 /** Get the current position (relative to in point).
257 mlt_position
mlt_producer_position( mlt_producer
this )
259 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
262 /** Get the current position (relative to start of producer).
265 mlt_position
mlt_producer_frame( mlt_producer
this )
267 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
270 /** Set the playing speed.
273 int mlt_producer_set_speed( mlt_producer
this, double speed
)
275 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed
);
278 /** Get the playing speed.
281 double mlt_producer_get_speed( mlt_producer
this )
283 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
286 /** Get the frames per second.
289 double mlt_producer_get_fps( mlt_producer
this )
291 mlt_profile profile
= mlt_service_profile( MLT_PRODUCER_SERVICE( this ) );
292 return mlt_profile_fps( profile
);
295 /** Set the in and out points.
298 int mlt_producer_set_in_and_out( mlt_producer
this, mlt_position in
, mlt_position out
)
300 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
302 // Correct ins and outs if necessary
305 else if ( in
>= mlt_producer_get_length( this ) )
306 in
= mlt_producer_get_length( this ) - 1;
310 else if ( out
>= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
311 out
= mlt_producer_get_length( this ) - 1;
312 else if ( out
>= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
313 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out
+ 1 );
315 // Swap ins and outs if wrong
324 mlt_events_block( properties
, properties
);
325 mlt_properties_set_position( properties
, "in", in
);
326 mlt_events_unblock( properties
, properties
);
327 mlt_properties_set_position( properties
, "out", out
);
332 /** Physically reduce the producer (typically a cut) to a 0 length.
333 Essentially, all 0 length cuts should be immediately removed by containers.
336 int mlt_producer_clear( mlt_producer
this )
340 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
341 mlt_events_block( properties
, properties
);
342 mlt_properties_set_position( properties
, "in", 0 );
343 mlt_events_unblock( properties
, properties
);
344 mlt_properties_set_position( properties
, "out", -1 );
349 /** Get the in point.
352 mlt_position
mlt_producer_get_in( mlt_producer
this )
354 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
357 /** Get the out point.
360 mlt_position
mlt_producer_get_out( mlt_producer
this )
362 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
365 /** Get the total play time.
368 mlt_position
mlt_producer_get_playtime( mlt_producer
this )
370 return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
373 /** Get the total length of the producer.
376 mlt_position
mlt_producer_get_length( mlt_producer
this )
378 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
381 /** Prepare for next frame.
384 void mlt_producer_prepare_next( mlt_producer
this )
386 if ( mlt_producer_get_speed( this ) != 0 )
387 mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
393 static int producer_get_frame( mlt_service service
, mlt_frame_ptr frame
, int index
)
396 mlt_producer
this = service
!= NULL ? service
->child
: NULL
;
398 if ( this != NULL
&& !mlt_producer_is_cut( this ) )
400 // Get the properties of this producer
401 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
403 // Determine eof handling
404 char *eof
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
406 // Get the speed of the producer
407 double speed
= mlt_producer_get_speed( this );
409 // We need to use the clone if it's specified
410 mlt_producer clone
= mlt_properties_get_data( properties
, "use_clone", NULL
);
412 // If no clone is specified, use this
413 clone
= clone
== NULL ?
this : clone
;
415 // A properly instatiated producer will have a get_frame method...
416 if ( this->get_frame
== NULL
|| ( !strcmp( eof
, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
418 // Generate a test frame
419 *frame
= mlt_frame_init( service
);
422 result
= mlt_frame_set_position( *frame
, mlt_producer_position( this ) );
424 // Mark as a test card
425 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_image", 1 );
426 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_audio", 1 );
428 // Calculate the next position
429 mlt_producer_prepare_next( this );
433 // Get the frame from the implementation
434 result
= this->get_frame( clone
, frame
, index
);
437 // Copy the fps and speed of the producer onto the frame
438 properties
= MLT_FRAME_PROPERTIES( *frame
);
439 mlt_properties_set_double( properties
, "_speed", speed
);
440 mlt_properties_set_int( properties
, "test_audio", mlt_frame_is_test_audio( *frame
) );
441 mlt_properties_set_int( properties
, "test_image", mlt_frame_is_test_card( *frame
) );
442 if ( mlt_properties_get_data( properties
, "_producer", NULL
) == NULL
)
443 mlt_properties_set_data( properties
, "_producer", service
, 0, NULL
, NULL
);
445 else if ( this != NULL
)
447 // Get the speed of the cut
448 double speed
= mlt_producer_get_speed( this );
450 // Get the parent of this cut
451 mlt_producer parent
= mlt_producer_cut_parent( this );
453 // Get the properties of the parent
454 mlt_properties parent_properties
= MLT_PRODUCER_PROPERTIES( parent
);
456 // Get the properties of the cut
457 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
459 // Determine the clone index
460 int clone_index
= mlt_properties_get_int( properties
, "_clone" );
462 // Determine the clone to use
463 mlt_producer clone
= this;
465 if ( clone_index
> 0 )
468 sprintf( key
, "_clone.%d", clone_index
- 1 );
469 clone
= mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), key
, NULL
);
470 if ( clone
== NULL
) fprintf( stderr
, "requested clone doesn't exist %d\n", clone_index
);
471 clone
= clone
== NULL ?
this : clone
;
478 // We need to seek to the correct position in the clone
479 mlt_producer_seek( clone
, mlt_producer_get_in( this ) + mlt_properties_get_int( properties
, "_position" ) );
481 // Assign the clone property to the parent
482 mlt_properties_set_data( parent_properties
, "use_clone", clone
, 0, NULL
, NULL
);
484 // Now get the frame from the parents service
485 result
= mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent
), frame
, index
);
487 // We're done with the clone now
488 mlt_properties_set_data( parent_properties
, "use_clone", NULL
, 0, NULL
, NULL
);
490 // This is useful and required by always_active transitions to determine in/out points of the cut
491 if ( mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame
), "_producer", NULL
) == MLT_PRODUCER_SERVICE( parent
) )
492 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame
), "_producer", this, 0, NULL
, NULL
);
494 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame
), "_speed", speed
);
495 mlt_producer_prepare_next( this );
499 *frame
= mlt_frame_init( service
);
503 // Pass on all meta properties from the producer/cut on to the frame
504 if ( *frame
!= NULL
&& this != NULL
)
507 mlt_properties p_props
= MLT_PRODUCER_PROPERTIES( this );
508 mlt_properties f_props
= MLT_FRAME_PROPERTIES( *frame
);
509 int count
= mlt_properties_count( p_props
);
510 for ( i
= 0; i
< count
; i
++ )
512 char *name
= mlt_properties_get_name( p_props
, i
);
513 if ( !strncmp( name
, "meta.", 5 ) )
514 mlt_properties_set( f_props
, name
, mlt_properties_get( p_props
, name
) );
515 else if ( !strncmp( name
, "set.", 4 ) )
516 mlt_properties_set( f_props
, name
+ 4, mlt_properties_get( p_props
, name
) );
526 int mlt_producer_attach( mlt_producer
this, mlt_filter filter
)
528 return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter
);
534 int mlt_producer_detach( mlt_producer
this, mlt_filter filter
)
536 return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter
);
539 /** Retrieve a filter.
542 mlt_filter
mlt_producer_filter( mlt_producer
this, int index
)
544 return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index
);
547 /** Clone this producer.
550 static mlt_producer
mlt_producer_clone( mlt_producer
this )
552 mlt_producer clone
= NULL
;
553 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
554 char *resource
= mlt_properties_get( properties
, "resource" );
555 char *service
= mlt_properties_get( properties
, "mlt_service" );
556 mlt_profile profile
= mlt_service_profile( MLT_PRODUCER_SERVICE( this ) );
558 mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
560 if ( service
!= NULL
)
561 clone
= mlt_factory_producer( profile
, service
, resource
);
563 if ( clone
== NULL
&& resource
!= NULL
)
564 clone
= mlt_factory_producer( profile
, mlt_environment( "MLT_PRODUCER" ), resource
);
567 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone
), properties
);
569 mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
577 static void mlt_producer_set_clones( mlt_producer
this, int clones
)
579 mlt_producer parent
= mlt_producer_cut_parent( this );
580 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( parent
);
581 int existing
= mlt_properties_get_int( properties
, "_clones" );
585 // If the number of existing clones is different, then create/remove as necessary
586 if ( existing
!= clones
)
588 if ( existing
< clones
)
590 for ( i
= existing
; i
< clones
; i
++ )
592 mlt_producer clone
= mlt_producer_clone( parent
);
593 sprintf( key
, "_clone.%d", i
);
594 mlt_properties_set_data( properties
, key
, clone
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
599 for ( i
= clones
; i
< existing
; i
++ )
601 sprintf( key
, "_clone.%d", i
);
602 mlt_properties_set_data( properties
, key
, NULL
, 0, NULL
, NULL
);
607 // Ensure all properties on the parent are passed to the clones
608 for ( i
= 0; i
< clones
; i
++ )
610 mlt_producer clone
= NULL
;
611 sprintf( key
, "_clone.%d", i
);
612 clone
= mlt_properties_get_data( properties
, key
, NULL
);
614 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone
), properties
, "" );
617 // Update the number of clones on the properties
618 mlt_properties_set_int( properties
, "_clones", clones
);
621 /** Optimise for overlapping cuts from the same clip.
642 static int intersect( clip_references
*a
, clip_references
*b
)
644 int diff
= ( a
->start
- b
->start
) + ( a
->end
- b
->end
);
645 return diff
>= 0 && diff
< ( a
->end
- a
->start
+ 1 );
648 static int push( mlt_parser
this, int multitrack
, int track
, int position
)
650 mlt_properties properties
= mlt_parser_properties( this );
651 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
652 track_info
*info
= malloc( sizeof( track_info
) );
653 info
->multitrack
= multitrack
;
655 info
->position
= position
;
658 return mlt_deque_push_back( stack
, info
);
661 static track_info
*pop( mlt_parser
this )
663 mlt_properties properties
= mlt_parser_properties( this );
664 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
665 return mlt_deque_pop_back( stack
);
668 static track_info
*peek( mlt_parser
this )
670 mlt_properties properties
= mlt_parser_properties( this );
671 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
672 return mlt_deque_peek_back( stack
);
675 static int on_start_multitrack( mlt_parser
this, mlt_multitrack object
)
677 track_info
*info
= peek( this );
678 return push( this, info
->multitrack
++, info
->track
, info
->position
);
681 static int on_start_track( mlt_parser
this )
683 track_info
*info
= peek( this );
684 info
->position
-= info
->offset
;
685 info
->length
-= info
->offset
;
686 return push( this, info
->multitrack
, info
->track
++, info
->position
);
689 static int on_start_producer( mlt_parser
this, mlt_producer object
)
691 mlt_properties properties
= mlt_parser_properties( this );
692 mlt_properties producers
= mlt_properties_get_data( properties
, "producers", NULL
);
693 mlt_producer parent
= mlt_producer_cut_parent( object
);
694 if ( mlt_service_identify( ( mlt_service
)mlt_producer_cut_parent( object
) ) == producer_type
&& mlt_producer_is_cut( object
) )
697 clip_references
*old_refs
= NULL
;
698 clip_references
*refs
= NULL
;
701 track_info
*info
= peek( this );
702 sprintf( key
, "%p", parent
);
703 mlt_properties_get_data( producers
, key
, &count
);
704 mlt_properties_set_data( producers
, key
, parent
, ++ count
, NULL
, NULL
);
705 old_refs
= mlt_properties_get_data( properties
, key
, &ref_count
);
706 refs
= malloc( ( ref_count
+ 1 ) * sizeof( clip_references
) );
707 if ( old_refs
!= NULL
)
708 memcpy( refs
, old_refs
, ref_count
* sizeof( clip_references
) );
709 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object
), "_clone", -1 );
710 refs
[ ref_count
].cut
= object
;
711 refs
[ ref_count
].start
= info
->position
;
712 refs
[ ref_count
].end
= info
->position
+ mlt_producer_get_playtime( object
) - 1;
713 mlt_properties_set_data( properties
, key
, refs
, ++ ref_count
, free
, NULL
);
714 info
->position
+= mlt_producer_get_playtime( object
);
715 info
->length
+= mlt_producer_get_playtime( object
);
720 static int on_end_track( mlt_parser
this )
722 track_info
*track
= pop( this );
723 track_info
*multi
= peek( this );
724 multi
->length
+= track
->length
;
725 multi
->position
+= track
->length
;
726 multi
->offset
= track
->length
;
731 static int on_end_multitrack( mlt_parser
this, mlt_multitrack object
)
733 track_info
*multi
= pop( this );
734 track_info
*track
= peek( this );
735 track
->position
+= multi
->length
;
736 track
->length
+= multi
->length
;
741 int mlt_producer_optimise( mlt_producer
this )
744 mlt_parser parser
= mlt_parser_new( );
745 if ( parser
!= NULL
)
747 int i
= 0, j
= 0, k
= 0;
748 mlt_properties properties
= mlt_parser_properties( parser
);
749 mlt_properties producers
= mlt_properties_new( );
750 mlt_deque stack
= mlt_deque_init( );
751 mlt_properties_set_data( properties
, "producers", producers
, 0, ( mlt_destructor
)mlt_properties_close
, NULL
);
752 mlt_properties_set_data( properties
, "stack", stack
, 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
753 parser
->on_start_producer
= on_start_producer
;
754 parser
->on_start_track
= on_start_track
;
755 parser
->on_end_track
= on_end_track
;
756 parser
->on_start_multitrack
= on_start_multitrack
;
757 parser
->on_end_multitrack
= on_end_multitrack
;
758 push( parser
, 0, 0, 0 );
759 mlt_parser_start( parser
, MLT_PRODUCER_SERVICE( this ) );
760 free( pop( parser
) );
761 for ( k
= 0; k
< mlt_properties_count( producers
); k
++ )
763 char *name
= mlt_properties_get_name( producers
, k
);
767 mlt_producer producer
= mlt_properties_get_data( producers
, name
, &count
);
768 if ( producer
!= NULL
&& count
> 1 )
770 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
771 for ( i
= 0; i
< count
; i
++ )
774 for ( j
= i
+ 1; j
< count
; j
++ )
776 if ( intersect( &refs
[ i
], &refs
[ j
] ) )
779 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs
[ j
].cut
), "_clone", clones
);
782 if ( clones
> max_clones
)
786 for ( i
= 0; i
< count
; i
++ )
788 mlt_producer cut
= refs
[ i
].cut
;
789 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone" ) == -1 )
790 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
793 mlt_producer_set_clones( producer
, max_clones
);
795 else if ( producer
!= NULL
)
797 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
798 for ( i
= 0; i
< count
; i
++ )
800 mlt_producer cut
= refs
[ i
].cut
;
801 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
803 mlt_producer_set_clones( producer
, 0 );
806 mlt_parser_close( parser
);
811 /** Close the producer.
814 void mlt_producer_close( mlt_producer
this )
816 if ( this != NULL
&& mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
818 this->parent
.close
= NULL
;
820 if ( this->close
!= NULL
)
822 this->close( this->close_object
);
826 int destroy
= mlt_producer_is_cut( this );
828 #if _MLT_PRODUCER_CHECKS_ == 1
830 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr
);
833 #ifdef _MLT_PRODUCER_CHECKS_
834 // Increment destroyed count
835 producers_destroyed
++;
837 // Show current stats - these should match when the app is closed
838 fprintf( stderr
, "Producers created %d, destroyed %d\n", producers_created
, producers_destroyed
);
841 mlt_service_close( &this->parent
);