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
22 #include "mlt_producer.h"
23 #include "mlt_factory.h"
24 #include "mlt_frame.h"
25 #include "mlt_parser.h"
26 #include "mlt_profile.h"
33 /** Forward references.
36 static int producer_get_frame( mlt_service
this, mlt_frame_ptr frame
, int index
);
37 static void mlt_producer_property_changed( mlt_service owner
, mlt_producer
this, char *name
);
38 static void mlt_producer_service_changed( mlt_service owner
, mlt_producer
this );
40 //#define _MLT_PRODUCER_CHECKS_ 1
42 #ifdef _MLT_PRODUCER_CHECKS_
43 static int producers_created
= 0;
44 static int producers_destroyed
= 0;
50 int mlt_producer_init( mlt_producer
this, void *child
)
52 // Check that we haven't received NULL
53 int error
= this == NULL
;
55 // Continue if no error
58 #ifdef _MLT_PRODUCER_CHECKS_
62 // Initialise the producer
63 memset( this, 0, sizeof( struct mlt_producer_s
) );
65 // Associate with the child
68 // Initialise the service
69 if ( mlt_service_init( &this->parent
, this ) == 0 )
71 // The parent is the service
72 mlt_service parent
= &this->parent
;
74 // Define the parent close
75 parent
->close
= ( mlt_destructor
)mlt_producer_close
;
76 parent
->close_object
= this;
78 // For convenience, we'll assume the close_object is this
79 this->close_object
= this;
81 // Get the properties of the parent
82 mlt_properties properties
= MLT_SERVICE_PROPERTIES( parent
);
84 // Set the default properties
85 mlt_properties_set( properties
, "mlt_type", "mlt_producer" );
86 mlt_properties_set_position( properties
, "_position", 0.0 );
87 mlt_properties_set_double( properties
, "_frame", 0 );
88 mlt_properties_set_double( properties
, "fps", mlt_profile_fps( NULL
) );
89 mlt_properties_set_int( properties
, "frame_rate_num", mlt_profile_get()->frame_rate_num
);
90 mlt_properties_set_int( properties
, "frame_rate_den", mlt_profile_get()->frame_rate_den
);
91 mlt_properties_set_double( properties
, "aspect_ratio", mlt_profile_sar( NULL
) );
92 mlt_properties_set_double( properties
, "_speed", 1.0 );
93 mlt_properties_set_position( properties
, "in", 0 );
94 mlt_properties_set_position( properties
, "out", 14999 );
95 mlt_properties_set_position( properties
, "length", 15000 );
96 mlt_properties_set( properties
, "eof", "pause" );
97 mlt_properties_set( properties
, "resource", "<producer>" );
99 // Override service get_frame
100 parent
->get_frame
= producer_get_frame
;
102 mlt_events_listen( properties
, this, "service-changed", ( mlt_listener
)mlt_producer_service_changed
);
103 mlt_events_listen( properties
, this, "property-changed", ( mlt_listener
)mlt_producer_property_changed
);
104 mlt_events_register( properties
, "producer-changed", NULL
);
111 /** Listener for property changes.
114 static void mlt_producer_property_changed( mlt_service owner
, mlt_producer
this, char *name
)
116 if ( !strcmp( name
, "in" ) || !strcmp( name
, "out" ) || !strcmp( name
, "length" ) )
117 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL
);
120 /** Listener for service changes.
123 static void mlt_producer_service_changed( mlt_service owner
, mlt_producer
this )
125 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL
);
128 /** Create a new producer.
131 mlt_producer
mlt_producer_new( )
133 mlt_producer
this = malloc( sizeof( struct mlt_producer_s
) );
134 mlt_producer_init( this, NULL
);
138 /** Determine if producer is a cut.
141 int mlt_producer_is_cut( mlt_producer
this )
143 return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
146 /** Determine if producer is a mix.
149 int mlt_producer_is_mix( mlt_producer
this )
151 mlt_properties properties
= this != NULL ?
MLT_PRODUCER_PROPERTIES( this ) : NULL
;
152 mlt_tractor tractor
= properties
!= NULL ?
mlt_properties_get_data( properties
, "mlt_mix", NULL
) : NULL
;
153 return tractor
!= NULL
;
156 /** Determine if the producer is a blank [from a playlist].
159 int mlt_producer_is_blank( mlt_producer
this )
161 return this == NULL
|| !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
164 /** Obtain the parent producer.
167 mlt_producer
mlt_producer_cut_parent( mlt_producer
this )
169 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
170 if ( mlt_producer_is_cut( this ) )
171 return mlt_properties_get_data( properties
, "_cut_parent", NULL
);
176 /** Create a cut of this producer
179 mlt_producer
mlt_producer_cut( mlt_producer
this, int in
, int out
)
181 mlt_producer result
= mlt_producer_new( );
182 mlt_producer parent
= mlt_producer_cut_parent( this );
183 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( result
);
184 mlt_properties parent_props
= MLT_PRODUCER_PROPERTIES( parent
);
186 mlt_events_block( MLT_PRODUCER_PROPERTIES( result
), MLT_PRODUCER_PROPERTIES( result
) );
187 // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
190 if ( ( out
< 0 || out
>= mlt_producer_get_length( parent
) ) && !mlt_producer_is_blank( this ) )
191 out
= mlt_producer_get_length( parent
) - 1;
193 mlt_properties_inc_ref( parent_props
);
194 mlt_properties_set_int( properties
, "_cut", 1 );
195 mlt_properties_set_data( properties
, "_cut_parent", parent
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
196 mlt_properties_set_position( properties
, "length", mlt_properties_get_position( parent_props
, "length" ) );
197 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( parent_props
, "aspect_ratio" ) );
198 mlt_producer_set_in_and_out( result
, in
, out
);
203 /** Get the parent service object.
206 mlt_service
mlt_producer_service( mlt_producer
this )
208 return this != NULL ?
&this->parent
: NULL
;
211 /** Get the producer properties.
214 mlt_properties
mlt_producer_properties( mlt_producer
this )
216 return MLT_SERVICE_PROPERTIES( &this->parent
);
219 /** Seek to a specified position.
222 int mlt_producer_seek( mlt_producer
this, mlt_position position
)
224 // Determine eof handling
225 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
226 char *eof
= mlt_properties_get( properties
, "eof" );
227 int use_points
= 1 - mlt_properties_get_int( properties
, "ignore_points" );
229 // Recursive behaviour for cuts - repositions parent and then repositions cut
230 // hence no return on this condition
231 if ( mlt_producer_is_cut( this ) )
232 mlt_producer_seek( mlt_producer_cut_parent( this ), position
+ mlt_producer_get_in( this ) );
235 if ( position
< 0 || mlt_producer_get_playtime( this ) == 0 )
239 else if ( use_points
&& ( eof
== NULL
|| !strcmp( eof
, "pause" ) ) && position
>= mlt_producer_get_playtime( this ) )
241 mlt_producer_set_speed( this, 0 );
242 position
= mlt_producer_get_playtime( this ) - 1;
244 else if ( use_points
&& !strcmp( eof
, "loop" ) && position
>= mlt_producer_get_playtime( this ) )
246 position
= (int)position
% (int)mlt_producer_get_playtime( this );
250 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position
);
252 // Calculate the absolute frame
253 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points
* mlt_producer_get_in( this ) + position
);
258 /** Get the current position (relative to in point).
261 mlt_position
mlt_producer_position( mlt_producer
this )
263 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
266 /** Get the current position (relative to start of producer).
269 mlt_position
mlt_producer_frame( mlt_producer
this )
271 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
274 /** Set the playing speed.
277 int mlt_producer_set_speed( mlt_producer
this, double speed
)
279 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed
);
282 /** Get the playing speed.
285 double mlt_producer_get_speed( mlt_producer
this )
287 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
290 /** Get the frames per second.
293 double mlt_producer_get_fps( mlt_producer
this )
295 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "fps" );
298 /** Set the in and out points.
301 int mlt_producer_set_in_and_out( mlt_producer
this, mlt_position in
, mlt_position out
)
303 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
305 // Correct ins and outs if necessary
308 else if ( in
>= mlt_producer_get_length( this ) )
309 in
= mlt_producer_get_length( this ) - 1;
313 else if ( out
>= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
314 out
= mlt_producer_get_length( this ) - 1;
315 else if ( out
>= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
316 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out
+ 1 );
318 // Swap ins and outs if wrong
327 mlt_events_block( properties
, properties
);
328 mlt_properties_set_position( properties
, "in", in
);
329 mlt_events_unblock( properties
, properties
);
330 mlt_properties_set_position( properties
, "out", out
);
335 /** Physically reduce the producer (typically a cut) to a 0 length.
336 Essentially, all 0 length cuts should be immediately removed by containers.
339 int mlt_producer_clear( mlt_producer
this )
343 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
344 mlt_events_block( properties
, properties
);
345 mlt_properties_set_position( properties
, "in", 0 );
346 mlt_events_unblock( properties
, properties
);
347 mlt_properties_set_position( properties
, "out", -1 );
352 /** Get the in point.
355 mlt_position
mlt_producer_get_in( mlt_producer
this )
357 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
360 /** Get the out point.
363 mlt_position
mlt_producer_get_out( mlt_producer
this )
365 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
368 /** Get the total play time.
371 mlt_position
mlt_producer_get_playtime( mlt_producer
this )
373 return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
376 /** Get the total length of the producer.
379 mlt_position
mlt_producer_get_length( mlt_producer
this )
381 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
384 /** Prepare for next frame.
387 void mlt_producer_prepare_next( mlt_producer
this )
389 if ( mlt_producer_get_speed( this ) != 0 )
390 mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
396 static int producer_get_frame( mlt_service service
, mlt_frame_ptr frame
, int index
)
399 mlt_producer
this = service
!= NULL ? service
->child
: NULL
;
401 if ( this != NULL
&& !mlt_producer_is_cut( this ) )
403 // Get the properties of this producer
404 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
406 // Determine eof handling
407 char *eof
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
409 // Get the speed of the producer
410 double speed
= mlt_producer_get_speed( this );
412 // We need to use the clone if it's specified
413 mlt_producer clone
= mlt_properties_get_data( properties
, "use_clone", NULL
);
415 // If no clone is specified, use this
416 clone
= clone
== NULL ?
this : clone
;
418 // A properly instatiated producer will have a get_frame method...
419 if ( this->get_frame
== NULL
|| ( !strcmp( eof
, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
421 // Generate a test frame
422 *frame
= mlt_frame_init( );
425 result
= mlt_frame_set_position( *frame
, mlt_producer_position( this ) );
427 // Mark as a test card
428 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_image", 1 );
429 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_audio", 1 );
431 // Calculate the next position
432 mlt_producer_prepare_next( this );
436 // Get the frame from the implementation
437 result
= this->get_frame( clone
, frame
, index
);
440 // Copy the fps and speed of the producer onto the frame
441 properties
= MLT_FRAME_PROPERTIES( *frame
);
442 mlt_properties_set_double( properties
, "_speed", speed
);
443 mlt_properties_set_double( properties
, "fps", mlt_producer_get_fps( this ) );
444 mlt_properties_set_int( properties
, "test_audio", mlt_frame_is_test_audio( *frame
) );
445 mlt_properties_set_int( properties
, "test_image", mlt_frame_is_test_card( *frame
) );
446 if ( mlt_properties_get_data( properties
, "_producer", NULL
) == NULL
)
447 mlt_properties_set_data( properties
, "_producer", service
, 0, NULL
, NULL
);
449 else if ( this != NULL
)
451 // Get the speed of the cut
452 double speed
= mlt_producer_get_speed( this );
454 // Get the parent of this cut
455 mlt_producer parent
= mlt_producer_cut_parent( this );
457 // Get the properties of the parent
458 mlt_properties parent_properties
= MLT_PRODUCER_PROPERTIES( parent
);
460 // Get the properties of the cut
461 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
463 // Determine the clone index
464 int clone_index
= mlt_properties_get_int( properties
, "_clone" );
466 // Determine the clone to use
467 mlt_producer clone
= this;
469 if ( clone_index
> 0 )
472 sprintf( key
, "_clone.%d", clone_index
- 1 );
473 clone
= mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), key
, NULL
);
474 if ( clone
== NULL
) fprintf( stderr
, "requested clone doesn't exist %d\n", clone_index
);
475 clone
= clone
== NULL ?
this : clone
;
482 // We need to seek to the correct position in the clone
483 mlt_producer_seek( clone
, mlt_producer_get_in( this ) + mlt_properties_get_int( properties
, "_position" ) );
485 // Assign the clone property to the parent
486 mlt_properties_set_data( parent_properties
, "use_clone", clone
, 0, NULL
, NULL
);
488 // Now get the frame from the parents service
489 result
= mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent
), frame
, index
);
491 // We're done with the clone now
492 mlt_properties_set_data( parent_properties
, "use_clone", NULL
, 0, NULL
, NULL
);
494 // This is useful and required by always_active transitions to determine in/out points of the cut
495 if ( mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame
), "_producer", NULL
) == MLT_PRODUCER_SERVICE( parent
) )
496 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame
), "_producer", this, 0, NULL
, NULL
);
498 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame
), "_speed", speed
);
499 mlt_producer_prepare_next( this );
503 *frame
= mlt_frame_init( );
507 // Pass on all meta properties from the producer/cut on to the frame
508 if ( *frame
!= NULL
&& this != NULL
)
511 mlt_properties p_props
= MLT_PRODUCER_PROPERTIES( this );
512 mlt_properties f_props
= MLT_FRAME_PROPERTIES( *frame
);
513 int count
= mlt_properties_count( p_props
);
514 for ( i
= 0; i
< count
; i
++ )
516 char *name
= mlt_properties_get_name( p_props
, i
);
517 if ( !strncmp( name
, "meta.", 5 ) )
518 mlt_properties_set( f_props
, name
, mlt_properties_get( p_props
, name
) );
519 else if ( !strncmp( name
, "set.", 4 ) )
520 mlt_properties_set( f_props
, name
+ 4, mlt_properties_get( p_props
, name
) );
530 int mlt_producer_attach( mlt_producer
this, mlt_filter filter
)
532 return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter
);
538 int mlt_producer_detach( mlt_producer
this, mlt_filter filter
)
540 return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter
);
543 /** Retrieve a filter.
546 mlt_filter
mlt_producer_filter( mlt_producer
this, int index
)
548 return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index
);
551 /** Clone this producer.
554 static mlt_producer
mlt_producer_clone( mlt_producer
this )
556 mlt_producer clone
= NULL
;
557 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
558 char *resource
= mlt_properties_get( properties
, "resource" );
559 char *service
= mlt_properties_get( properties
, "mlt_service" );
561 mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
563 if ( service
!= NULL
)
564 clone
= mlt_factory_producer( service
, resource
);
566 if ( clone
== NULL
&& resource
!= NULL
)
567 clone
= mlt_factory_producer( "fezzik", resource
);
570 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone
), properties
);
572 mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
580 static void mlt_producer_set_clones( mlt_producer
this, int clones
)
582 mlt_producer parent
= mlt_producer_cut_parent( this );
583 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( parent
);
584 int existing
= mlt_properties_get_int( properties
, "_clones" );
588 // If the number of existing clones is different, then create/remove as necessary
589 if ( existing
!= clones
)
591 if ( existing
< clones
)
593 for ( i
= existing
; i
< clones
; i
++ )
595 mlt_producer clone
= mlt_producer_clone( parent
);
596 sprintf( key
, "_clone.%d", i
);
597 mlt_properties_set_data( properties
, key
, clone
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
602 for ( i
= clones
; i
< existing
; i
++ )
604 sprintf( key
, "_clone.%d", i
);
605 mlt_properties_set_data( properties
, key
, NULL
, 0, NULL
, NULL
);
610 // Ensure all properties on the parent are passed to the clones
611 for ( i
= 0; i
< clones
; i
++ )
613 mlt_producer clone
= NULL
;
614 sprintf( key
, "_clone.%d", i
);
615 clone
= mlt_properties_get_data( properties
, key
, NULL
);
617 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone
), properties
, "" );
620 // Update the number of clones on the properties
621 mlt_properties_set_int( properties
, "_clones", clones
);
624 /** Optimise for overlapping cuts from the same clip.
645 static int intersect( clip_references
*a
, clip_references
*b
)
647 int diff
= ( a
->start
- b
->start
) + ( a
->end
- b
->end
);
648 return diff
>= 0 && diff
< ( a
->end
- a
->start
+ 1 );
651 static int push( mlt_parser
this, int multitrack
, int track
, int position
)
653 mlt_properties properties
= mlt_parser_properties( this );
654 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
655 track_info
*info
= malloc( sizeof( track_info
) );
656 info
->multitrack
= multitrack
;
658 info
->position
= position
;
661 return mlt_deque_push_back( stack
, info
);
664 static track_info
*pop( mlt_parser
this )
666 mlt_properties properties
= mlt_parser_properties( this );
667 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
668 return mlt_deque_pop_back( stack
);
671 static track_info
*peek( mlt_parser
this )
673 mlt_properties properties
= mlt_parser_properties( this );
674 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
675 return mlt_deque_peek_back( stack
);
678 static int on_start_multitrack( mlt_parser
this, mlt_multitrack object
)
680 track_info
*info
= peek( this );
681 return push( this, info
->multitrack
++, info
->track
, info
->position
);
684 static int on_start_track( mlt_parser
this )
686 track_info
*info
= peek( this );
687 info
->position
-= info
->offset
;
688 info
->length
-= info
->offset
;
689 return push( this, info
->multitrack
, info
->track
++, info
->position
);
692 static int on_start_producer( mlt_parser
this, mlt_producer object
)
694 mlt_properties properties
= mlt_parser_properties( this );
695 mlt_properties producers
= mlt_properties_get_data( properties
, "producers", NULL
);
696 mlt_producer parent
= mlt_producer_cut_parent( object
);
697 if ( mlt_service_identify( ( mlt_service
)mlt_producer_cut_parent( object
) ) == producer_type
&& mlt_producer_is_cut( object
) )
700 clip_references
*old_refs
= NULL
;
701 clip_references
*refs
= NULL
;
704 track_info
*info
= peek( this );
705 sprintf( key
, "%p", parent
);
706 mlt_properties_get_data( producers
, key
, &count
);
707 mlt_properties_set_data( producers
, key
, parent
, ++ count
, NULL
, NULL
);
708 old_refs
= mlt_properties_get_data( properties
, key
, &ref_count
);
709 refs
= malloc( ( ref_count
+ 1 ) * sizeof( clip_references
) );
710 if ( old_refs
!= NULL
)
711 memcpy( refs
, old_refs
, ref_count
* sizeof( clip_references
) );
712 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object
), "_clone", -1 );
713 refs
[ ref_count
].cut
= object
;
714 refs
[ ref_count
].start
= info
->position
;
715 refs
[ ref_count
].end
= info
->position
+ mlt_producer_get_playtime( object
) - 1;
716 mlt_properties_set_data( properties
, key
, refs
, ++ ref_count
, free
, NULL
);
717 info
->position
+= mlt_producer_get_playtime( object
);
718 info
->length
+= mlt_producer_get_playtime( object
);
723 static int on_end_track( mlt_parser
this )
725 track_info
*track
= pop( this );
726 track_info
*multi
= peek( this );
727 multi
->length
+= track
->length
;
728 multi
->position
+= track
->length
;
729 multi
->offset
= track
->length
;
734 static int on_end_multitrack( mlt_parser
this, mlt_multitrack object
)
736 track_info
*multi
= pop( this );
737 track_info
*track
= peek( this );
738 track
->position
+= multi
->length
;
739 track
->length
+= multi
->length
;
744 int mlt_producer_optimise( mlt_producer
this )
747 mlt_parser parser
= mlt_parser_new( );
748 if ( parser
!= NULL
)
750 int i
= 0, j
= 0, k
= 0;
751 mlt_properties properties
= mlt_parser_properties( parser
);
752 mlt_properties producers
= mlt_properties_new( );
753 mlt_deque stack
= mlt_deque_init( );
754 mlt_properties_set_data( properties
, "producers", producers
, 0, ( mlt_destructor
)mlt_properties_close
, NULL
);
755 mlt_properties_set_data( properties
, "stack", stack
, 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
756 parser
->on_start_producer
= on_start_producer
;
757 parser
->on_start_track
= on_start_track
;
758 parser
->on_end_track
= on_end_track
;
759 parser
->on_start_multitrack
= on_start_multitrack
;
760 parser
->on_end_multitrack
= on_end_multitrack
;
761 push( parser
, 0, 0, 0 );
762 mlt_parser_start( parser
, MLT_PRODUCER_SERVICE( this ) );
763 free( pop( parser
) );
764 for ( k
= 0; k
< mlt_properties_count( producers
); k
++ )
766 char *name
= mlt_properties_get_name( producers
, k
);
770 mlt_producer producer
= mlt_properties_get_data( producers
, name
, &count
);
771 if ( producer
!= NULL
&& count
> 1 )
773 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
774 for ( i
= 0; i
< count
; i
++ )
777 for ( j
= i
+ 1; j
< count
; j
++ )
779 if ( intersect( &refs
[ i
], &refs
[ j
] ) )
782 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs
[ j
].cut
), "_clone", clones
);
785 if ( clones
> max_clones
)
789 for ( i
= 0; i
< count
; i
++ )
791 mlt_producer cut
= refs
[ i
].cut
;
792 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone" ) == -1 )
793 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
796 mlt_producer_set_clones( producer
, max_clones
);
798 else if ( producer
!= NULL
)
800 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
801 for ( i
= 0; i
< count
; i
++ )
803 mlt_producer cut
= refs
[ i
].cut
;
804 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
806 mlt_producer_set_clones( producer
, 0 );
809 mlt_parser_close( parser
);
814 /** Close the producer.
817 void mlt_producer_close( mlt_producer
this )
819 if ( this != NULL
&& mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
821 this->parent
.close
= NULL
;
823 if ( this->close
!= NULL
)
825 this->close( this->close_object
);
829 int destroy
= mlt_producer_is_cut( this );
831 #if _MLT_PRODUCER_CHECKS_ == 1
833 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr
);
836 #ifdef _MLT_PRODUCER_CHECKS_
837 // Increment destroyed count
838 producers_destroyed
++;
840 // Show current stats - these should match when the app is closed
841 fprintf( stderr
, "Producers created %d, destroyed %d\n", producers_created
, producers_destroyed
);
844 mlt_service_close( &this->parent
);