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_int( properties, "frame_rate_num", 25 );
93 mlt_properties_set_int( properties, "frame_rate_den", 1 );
94 mlt_properties_set_double( properties, "aspect_ratio", 59.0 / 54.0 );
98 mlt_properties_set_double( properties, "fps", 30000.0 / 1001.0 );
99 mlt_properties_set_int( properties, "frame_rate_num", 30000 );
100 mlt_properties_set_int( properties, "frame_rate_den", 1001 );
101 mlt_properties_set_double( properties, "aspect_ratio", 10.0 / 11.0 );
103 mlt_properties_set_double( properties, "_speed", 1.0 );
104 mlt_properties_set_position( properties, "in", 0 );
105 mlt_properties_set_position( properties, "out", 14999 );
106 mlt_properties_set_position( properties, "length", 15000 );
107 mlt_properties_set( properties, "eof", "pause" );
108 mlt_properties_set( properties, "resource", "<producer>" );
110 // Override service get_frame
111 parent->get_frame = producer_get_frame;
113 mlt_events_listen( properties, this, "service-changed", ( mlt_listener )mlt_producer_service_changed );
114 mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_producer_property_changed );
115 mlt_events_register( properties, "producer-changed", NULL );
122 /** Listener for property changes.
125 static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name )
127 if ( !strcmp( name, "in" ) || !strcmp( name, "out" ) || !strcmp( name, "length" ) )
128 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
131 /** Listener for service changes.
134 static void mlt_producer_service_changed( mlt_service owner, mlt_producer this )
136 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
139 /** Create a new producer.
142 mlt_producer mlt_producer_new( )
144 mlt_producer this = malloc( sizeof( struct mlt_producer_s ) );
145 mlt_producer_init( this, NULL );
149 /** Determine if producer is a cut.
152 int mlt_producer_is_cut( mlt_producer this )
154 return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
157 /** Determine if producer is a mix.
160 int mlt_producer_is_mix( mlt_producer this )
162 mlt_properties properties = this != NULL ? MLT_PRODUCER_PROPERTIES( this ) : NULL;
163 mlt_tractor tractor = properties != NULL ? mlt_properties_get_data( properties, "mlt_mix", NULL ) : NULL;
164 return tractor != NULL;
167 /** Determine if the producer is a blank [from a playlist].
170 int mlt_producer_is_blank( mlt_producer this )
172 return this == NULL || !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
175 /** Obtain the parent producer.
178 mlt_producer mlt_producer_cut_parent( mlt_producer this )
180 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
181 if ( mlt_producer_is_cut( this ) )
182 return mlt_properties_get_data( properties, "_cut_parent", NULL );
187 /** Create a cut of this producer
190 mlt_producer mlt_producer_cut( mlt_producer this, int in, int out )
192 mlt_producer result = mlt_producer_new( );
193 mlt_producer parent = mlt_producer_cut_parent( this );
194 mlt_properties properties = MLT_PRODUCER_PROPERTIES( result );
195 mlt_properties parent_props = MLT_PRODUCER_PROPERTIES( parent );
197 mlt_events_block( MLT_PRODUCER_PROPERTIES( result ), MLT_PRODUCER_PROPERTIES( result ) );
198 // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
201 if ( ( out < 0 || out >= mlt_producer_get_length( parent ) ) && !mlt_producer_is_blank( this ) )
202 out = mlt_producer_get_length( parent ) - 1;
204 mlt_properties_inc_ref( parent_props );
205 mlt_properties_set_int( properties, "_cut", 1 );
206 mlt_properties_set_data( properties, "_cut_parent", parent, 0, ( mlt_destructor )mlt_producer_close, NULL );
207 mlt_properties_set_position( properties, "length", mlt_properties_get_position( parent_props, "length" ) );
208 mlt_producer_set_in_and_out( result, in, out );
211 mlt_filter filter = mlt_factory_filter( "data_feed", "attr_check" );
212 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "_fezzik", 1 );
213 mlt_producer_attach( result, filter );
214 mlt_filter_close( filter );
219 /** Get the parent service object.
222 mlt_service mlt_producer_service( mlt_producer this )
224 return this != NULL ? &this->parent : NULL;
227 /** Get the producer properties.
230 mlt_properties mlt_producer_properties( mlt_producer this )
232 return MLT_SERVICE_PROPERTIES( &this->parent );
235 /** Seek to a specified position.
238 int mlt_producer_seek( mlt_producer this, mlt_position position )
240 // Determine eof handling
241 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
242 char *eof = mlt_properties_get( properties, "eof" );
243 int use_points = 1 - mlt_properties_get_int( properties, "ignore_points" );
245 // Recursive behaviour for cuts - repositions parent and then repositions cut
246 // hence no return on this condition
247 if ( mlt_producer_is_cut( this ) )
248 mlt_producer_seek( mlt_producer_cut_parent( this ), position + mlt_producer_get_in( this ) );
251 if ( position < 0 || mlt_producer_get_playtime( this ) == 0 )
255 else if ( use_points && !strcmp( eof, "pause" ) && position >= mlt_producer_get_playtime( this ) )
257 mlt_producer_set_speed( this, 0 );
258 position = mlt_producer_get_playtime( this ) - 1;
260 else if ( use_points && !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( this ) )
262 position = position % mlt_producer_get_playtime( this );
266 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position );
268 // Calculate the absolute frame
269 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points * mlt_producer_get_in( this ) + position );
274 /** Get the current position (relative to in point).
277 mlt_position mlt_producer_position( mlt_producer this )
279 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
282 /** Get the current position (relative to start of producer).
285 mlt_position mlt_producer_frame( mlt_producer this )
287 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
290 /** Set the playing speed.
293 int mlt_producer_set_speed( mlt_producer this, double speed )
295 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed );
298 /** Get the playing speed.
301 double mlt_producer_get_speed( mlt_producer this )
303 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
306 /** Get the frames per second.
309 double mlt_producer_get_fps( mlt_producer this )
311 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "fps" );
314 /** Set the in and out points.
317 int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_position out )
319 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
321 // Correct ins and outs if necessary
324 else if ( in >= mlt_producer_get_length( this ) )
325 in = mlt_producer_get_length( this ) - 1;
329 else if ( out >= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
330 out = mlt_producer_get_length( this ) - 1;
331 else if ( out >= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
332 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out + 1 );
334 // Swap ins and outs if wrong
343 mlt_events_block( properties, properties );
344 mlt_properties_set_position( properties, "in", in );
345 mlt_events_unblock( properties, properties );
346 mlt_properties_set_position( properties, "out", out );
351 /** Physically reduce the producer (typically a cut) to a 0 length.
352 Essentially, all 0 length cuts should be immediately removed by containers.
355 int mlt_producer_clear( mlt_producer this )
359 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
360 mlt_events_block( properties, properties );
361 mlt_properties_set_position( properties, "in", 0 );
362 mlt_events_unblock( properties, properties );
363 mlt_properties_set_position( properties, "out", -1 );
368 /** Get the in point.
371 mlt_position mlt_producer_get_in( mlt_producer this )
373 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
376 /** Get the out point.
379 mlt_position mlt_producer_get_out( mlt_producer this )
381 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
384 /** Get the total play time.
387 mlt_position mlt_producer_get_playtime( mlt_producer this )
389 return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
392 /** Get the total length of the producer.
395 mlt_position mlt_producer_get_length( mlt_producer this )
397 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
400 /** Prepare for next frame.
403 void mlt_producer_prepare_next( mlt_producer this )
405 if ( mlt_producer_get_speed( this ) != 0 )
406 mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
412 static int producer_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
415 mlt_producer this = service != NULL ? service->child : NULL;
417 if ( this != NULL && !mlt_producer_is_cut( this ) )
419 // Get the properties of this producer
420 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
422 // Determine eof handling
423 char *eof = mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
425 // Get the speed of the producer
426 double speed = mlt_producer_get_speed( this );
428 // We need to use the clone if it's specified
429 mlt_producer clone = mlt_properties_get_data( properties, "use_clone", NULL );
431 // If no clone is specified, use this
432 clone = clone == NULL ? this : clone;
434 // A properly instatiated producer will have a get_frame method...
435 if ( this->get_frame == NULL || ( !strcmp( eof, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
437 // Generate a test frame
438 *frame = mlt_frame_init( );
441 result = mlt_frame_set_position( *frame, mlt_producer_position( this ) );
443 // Mark as a test card
444 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_image", 1 );
445 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame ), "test_audio", 1 );
447 // Calculate the next position
448 mlt_producer_prepare_next( this );
452 // Get the frame from the implementation
453 result = this->get_frame( clone, frame, index );
456 // Copy the fps and speed of the producer onto the frame
457 properties = MLT_FRAME_PROPERTIES( *frame );
458 mlt_properties_set_double( properties, "_speed", speed );
459 mlt_properties_set_double( properties, "fps", mlt_producer_get_fps( this ) );
460 mlt_properties_set_int( properties, "test_audio", mlt_frame_is_test_audio( *frame ) );
461 mlt_properties_set_int( properties, "test_image", mlt_frame_is_test_card( *frame ) );
462 if ( mlt_properties_get_data( properties, "_producer", NULL ) == NULL )
463 mlt_properties_set_data( properties, "_producer", service, 0, NULL, NULL );
465 else if ( this != NULL )
467 // Get the speed of the cut
468 double speed = mlt_producer_get_speed( this );
470 // Get the parent of this cut
471 mlt_producer parent = mlt_producer_cut_parent( this );
473 // Get the properties of the parent
474 mlt_properties parent_properties = MLT_PRODUCER_PROPERTIES( parent );
476 // Get the properties of the cut
477 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
479 // Determine the clone index
480 int clone_index = mlt_properties_get_int( properties, "_clone" );
482 // Determine the clone to use
483 mlt_producer clone = this;
485 if ( clone_index > 0 )
488 sprintf( key, "_clone.%d", clone_index - 1 );
489 clone = mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), key, NULL );
490 if ( clone == NULL ) fprintf( stderr, "requested clone doesn't exist %d\n", clone_index );
491 clone = clone == NULL ? this : clone;
498 // We need to seek to the correct position in the clone
499 mlt_producer_seek( clone, mlt_producer_get_in( this ) + mlt_properties_get_int( properties, "_position" ) );
501 // Assign the clone property to the parent
502 mlt_properties_set_data( parent_properties, "use_clone", clone, 0, NULL, NULL );
504 // Now get the frame from the parents service
505 result = mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent ), frame, index );
507 // We're done with the clone now
508 mlt_properties_set_data( parent_properties, "use_clone", NULL, 0, NULL, NULL );
510 // This is useful and required by always_active transitions to determine in/out points of the cut
511 if ( mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame ), "_producer", NULL ) == MLT_PRODUCER_SERVICE( parent ) )
512 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "_producer", this, 0, NULL, NULL );
514 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame ), "_speed", speed );
515 mlt_producer_prepare_next( this );
519 *frame = mlt_frame_init( );
523 // Pass on all meta properties from the producer/cut on to the frame
524 if ( *frame != NULL && this != NULL )
527 mlt_properties p_props = MLT_PRODUCER_PROPERTIES( this );
528 mlt_properties f_props = MLT_FRAME_PROPERTIES( *frame );
529 int count = mlt_properties_count( p_props );
530 for ( i = 0; i < count; i ++ )
532 char *name = mlt_properties_get_name( p_props, i );
533 if ( !strncmp( name, "meta.", 5 ) )
534 mlt_properties_set( f_props, name, mlt_properties_get( p_props, name ) );
535 else if ( !strncmp( name, "set.", 4 ) )
536 mlt_properties_set( f_props, name + 4, mlt_properties_get( p_props, name ) );
546 int mlt_producer_attach( mlt_producer this, mlt_filter filter )
548 return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter );
554 int mlt_producer_detach( mlt_producer this, mlt_filter filter )
556 return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter );
559 /** Retrieve a filter.
562 mlt_filter mlt_producer_filter( mlt_producer this, int index )
564 return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index );
567 /** Clone this producer.
570 static mlt_producer mlt_producer_clone( mlt_producer this )
572 mlt_producer clone = NULL;
573 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
574 char *resource = mlt_properties_get( properties, "resource" );
575 char *service = mlt_properties_get( properties, "mlt_service" );
577 mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
579 if ( service != NULL )
580 clone = mlt_factory_producer( service, resource );
582 if ( clone == NULL && resource != NULL )
583 clone = mlt_factory_producer( "fezzik", resource );
586 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone ), properties );
588 mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
596 static void mlt_producer_set_clones( mlt_producer this, int clones )
598 mlt_producer parent = mlt_producer_cut_parent( this );
599 mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );
600 int existing = mlt_properties_get_int( properties, "_clones" );
604 // If the number of existing clones is different, then create/remove as necessary
605 if ( existing != clones )
607 if ( existing < clones )
609 for ( i = existing; i < clones; i ++ )
611 mlt_producer clone = mlt_producer_clone( parent );
612 sprintf( key, "_clone.%d", i );
613 mlt_properties_set_data( properties, key, clone, 0, ( mlt_destructor )mlt_producer_close, NULL );
618 for ( i = clones; i < existing; i ++ )
620 sprintf( key, "_clone.%d", i );
621 mlt_properties_set_data( properties, key, NULL, 0, NULL, NULL );
626 // Ensure all properties on the parent are passed to the clones
627 for ( i = 0; i < clones; i ++ )
629 mlt_producer clone = NULL;
630 sprintf( key, "_clone.%d", i );
631 clone = mlt_properties_get_data( properties, key, NULL );
633 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone ), properties, "" );
636 // Update the number of clones on the properties
637 mlt_properties_set_int( properties, "_clones", clones );
640 /** Optimise for overlapping cuts from the same clip.
661 static int intersect( clip_references *a, clip_references *b )
663 int diff = ( a->start - b->start ) + ( a->end - b->end );
664 return diff >= 0 && diff < ( a->end - a->start + 1 );
667 static int push( mlt_parser this, int multitrack, int track, int position )
669 mlt_properties properties = mlt_parser_properties( this );
670 mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
671 track_info *info = malloc( sizeof( track_info ) );
672 info->multitrack = multitrack;
674 info->position = position;
677 return mlt_deque_push_back( stack, info );
680 static track_info *pop( mlt_parser this )
682 mlt_properties properties = mlt_parser_properties( this );
683 mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
684 return mlt_deque_pop_back( stack );
687 static track_info *peek( mlt_parser this )
689 mlt_properties properties = mlt_parser_properties( this );
690 mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
691 return mlt_deque_peek_back( stack );
694 static int on_start_multitrack( mlt_parser this, mlt_multitrack object )
696 track_info *info = peek( this );
697 return push( this, info->multitrack ++, info->track, info->position );
700 static int on_start_track( mlt_parser this )
702 track_info *info = peek( this );
703 info->position -= info->offset;
704 info->length -= info->offset;
705 return push( this, info->multitrack, info->track ++, info->position );
708 static int on_start_producer( mlt_parser this, mlt_producer object )
710 mlt_properties properties = mlt_parser_properties( this );
711 mlt_properties producers = mlt_properties_get_data( properties, "producers", NULL );
712 mlt_producer parent = mlt_producer_cut_parent( object );
713 if ( mlt_service_identify( ( mlt_service )mlt_producer_cut_parent( object ) ) == producer_type && mlt_producer_is_cut( object ) )
716 clip_references *old_refs = NULL;
717 clip_references *refs = NULL;
720 track_info *info = peek( this );
721 sprintf( key, "%p", parent );
722 mlt_properties_get_data( producers, key, &count );
723 mlt_properties_set_data( producers, key, parent, ++ count, NULL, NULL );
724 old_refs = mlt_properties_get_data( properties, key, &ref_count );
725 refs = malloc( ( ref_count + 1 ) * sizeof( clip_references ) );
726 if ( old_refs != NULL )
727 memcpy( refs, old_refs, ref_count * sizeof( clip_references ) );
728 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object ), "_clone", -1 );
729 refs[ ref_count ].cut = object;
730 refs[ ref_count ].start = info->position;
731 refs[ ref_count ].end = info->position + mlt_producer_get_playtime( object ) - 1;
732 mlt_properties_set_data( properties, key, refs, ++ ref_count, free, NULL );
733 info->position += mlt_producer_get_playtime( object );
734 info->length += mlt_producer_get_playtime( object );
739 static int on_end_track( mlt_parser this )
741 track_info *track = pop( this );
742 track_info *multi = peek( this );
743 multi->length += track->length;
744 multi->position += track->length;
745 multi->offset = track->length;
750 static int on_end_multitrack( mlt_parser this, mlt_multitrack object )
752 track_info *multi = pop( this );
753 track_info *track = peek( this );
754 track->position += multi->length;
755 track->length += multi->length;
760 int mlt_producer_optimise( mlt_producer this )
763 mlt_parser parser = mlt_parser_new( );
764 if ( parser != NULL )
766 int i = 0, j = 0, k = 0;
767 mlt_properties properties = mlt_parser_properties( parser );
768 mlt_properties producers = mlt_properties_new( );
769 mlt_deque stack = mlt_deque_init( );
770 mlt_properties_set_data( properties, "producers", producers, 0, ( mlt_destructor )mlt_properties_close, NULL );
771 mlt_properties_set_data( properties, "stack", stack, 0, ( mlt_destructor )mlt_deque_close, NULL );
772 parser->on_start_producer = on_start_producer;
773 parser->on_start_track = on_start_track;
774 parser->on_end_track = on_end_track;
775 parser->on_start_multitrack = on_start_multitrack;
776 parser->on_end_multitrack = on_end_multitrack;
777 push( parser, 0, 0, 0 );
778 mlt_parser_start( parser, MLT_PRODUCER_SERVICE( this ) );
779 free( pop( parser ) );
780 for ( k = 0; k < mlt_properties_count( producers ); k ++ )
782 char *name = mlt_properties_get_name( producers, k );
786 mlt_producer producer = mlt_properties_get_data( producers, name, &count );
787 if ( producer != NULL && count > 1 )
789 clip_references *refs = mlt_properties_get_data( properties, name, &count );
790 for ( i = 0; i < count; i ++ )
793 for ( j = i + 1; j < count; j ++ )
795 if ( intersect( &refs[ i ], &refs[ j ] ) )
798 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs[ j ].cut ), "_clone", clones );
801 if ( clones > max_clones )
805 for ( i = 0; i < count; i ++ )
807 mlt_producer cut = refs[ i ].cut;
808 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone" ) == -1 )
809 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone", 0 );
812 mlt_producer_set_clones( producer, max_clones );
814 else if ( producer != NULL )
816 clip_references *refs = mlt_properties_get_data( properties, name, &count );
817 for ( i = 0; i < count; i ++ )
819 mlt_producer cut = refs[ i ].cut;
820 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone", 0 );
822 mlt_producer_set_clones( producer, 0 );
825 mlt_parser_close( parser );
830 /** Close the producer.
833 void mlt_producer_close( mlt_producer this )
835 if ( this != NULL && mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
837 this->parent.close = NULL;
839 if ( this->close != NULL )
841 this->close( this->close_object );
845 int destroy = mlt_producer_is_cut( this );
847 #if _MLT_PRODUCER_CHECKS_ == 1
849 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr );
852 #ifdef _MLT_PRODUCER_CHECKS_
853 // Increment destroyed count
854 producers_destroyed ++;
856 // Show current stats - these should match when the app is closed
857 fprintf( stderr, "Producers created %d, destroyed %d\n", producers_created, producers_destroyed );
860 mlt_service_close( &this->parent );