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 );
215 /** Get the parent service object.
218 mlt_service mlt_producer_service( mlt_producer this )
220 return this != NULL ? &this->parent : NULL;
223 /** Get the producer properties.
226 mlt_properties mlt_producer_properties( mlt_producer this )
228 return MLT_SERVICE_PROPERTIES( &this->parent );
231 /** Seek to a specified position.
234 int mlt_producer_seek( mlt_producer this, mlt_position position )
236 // Determine eof handling
237 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
238 char *eof = mlt_properties_get( properties, "eof" );
239 int use_points = 1 - mlt_properties_get_int( properties, "ignore_points" );
241 // Recursive behaviour for cuts - repositions parent and then repositions cut
242 // hence no return on this condition
243 if ( mlt_producer_is_cut( this ) )
244 mlt_producer_seek( mlt_producer_cut_parent( this ), position + mlt_producer_get_in( this ) );
251 else if ( use_points && !strcmp( eof, "pause" ) && position >= mlt_producer_get_playtime( this ) )
253 mlt_producer_set_speed( this, 0 );
254 position = mlt_producer_get_playtime( this ) - 1;
256 else if ( use_points && !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( this ) )
258 position = position % mlt_producer_get_playtime( this );
262 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position );
264 // Calculate the absolute frame
265 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points * mlt_producer_get_in( this ) + position );
270 /** Get the current position (relative to in point).
273 mlt_position mlt_producer_position( mlt_producer this )
275 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
278 /** Get the current position (relative to start of producer).
281 mlt_position mlt_producer_frame( mlt_producer this )
283 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
286 /** Set the playing speed.
289 int mlt_producer_set_speed( mlt_producer this, double speed )
291 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed );
294 /** Get the playing speed.
297 double mlt_producer_get_speed( mlt_producer this )
299 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
302 /** Get the frames per second.
305 double mlt_producer_get_fps( mlt_producer this )
307 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "fps" );
310 /** Set the in and out points.
313 int mlt_producer_set_in_and_out( mlt_producer this, mlt_position in, mlt_position out )
315 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
317 // Correct ins and outs if necessary
320 else if ( in >= mlt_producer_get_length( this ) )
321 in = mlt_producer_get_length( this ) - 1;
325 else if ( out >= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
326 out = mlt_producer_get_length( this ) - 1;
327 else if ( out >= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
328 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out + 1 );
330 // Swap ins and outs if wrong
339 mlt_events_block( properties, properties );
340 mlt_properties_set_position( properties, "in", in );
341 mlt_events_unblock( properties, properties );
342 mlt_properties_set_position( properties, "out", out );
347 /** Physically reduce the producer (typically a cut) to a 0 length.
348 Essentially, all 0 length cuts should be immediately removed by containers.
351 int mlt_producer_clear( mlt_producer this )
355 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
356 mlt_events_block( properties, properties );
357 mlt_properties_set_position( properties, "in", 0 );
358 mlt_events_unblock( properties, properties );
359 mlt_properties_set_position( properties, "out", -1 );
364 /** Get the in point.
367 mlt_position mlt_producer_get_in( mlt_producer this )
369 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
372 /** Get the out point.
375 mlt_position mlt_producer_get_out( mlt_producer this )
377 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
380 /** Get the total play time.
383 mlt_position mlt_producer_get_playtime( mlt_producer this )
385 return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
388 /** Get the total length of the producer.
391 mlt_position mlt_producer_get_length( mlt_producer this )
393 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
396 /** Prepare for next frame.
399 void mlt_producer_prepare_next( mlt_producer this )
401 if ( mlt_producer_get_speed( this ) != 0 )
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 int destroy = mlt_producer_is_cut( this );
837 #if _MLT_PRODUCER_CHECKS_ == 1
839 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr );
842 #ifdef _MLT_PRODUCER_CHECKS_
843 // Increment destroyed count
844 producers_destroyed ++;
846 // Show current stats - these should match when the app is closed
847 fprintf( stderr, "Producers created %d, destroyed %d\n", producers_created, producers_destroyed );
850 mlt_service_close( &this->parent );