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, "aspect_ratio", mlt_profile_sar( NULL ) );
89 mlt_properties_set_double( properties, "_speed", 1.0 );
90 mlt_properties_set_position( properties, "in", 0 );
91 mlt_properties_set_position( properties, "out", 14999 );
92 mlt_properties_set_position( properties, "length", 15000 );
93 mlt_properties_set( properties, "eof", "pause" );
94 mlt_properties_set( properties, "resource", "<producer>" );
96 // Override service get_frame
97 parent->get_frame = producer_get_frame;
99 mlt_events_listen( properties, this, "service-changed", ( mlt_listener )mlt_producer_service_changed );
100 mlt_events_listen( properties, this, "property-changed", ( mlt_listener )mlt_producer_property_changed );
101 mlt_events_register( properties, "producer-changed", NULL );
108 /** Listener for property changes.
111 static void mlt_producer_property_changed( mlt_service owner, mlt_producer this, char *name )
113 if ( !strcmp( name, "in" ) || !strcmp( name, "out" ) || !strcmp( name, "length" ) )
114 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
117 /** Listener for service changes.
120 static void mlt_producer_service_changed( mlt_service owner, mlt_producer this )
122 mlt_events_fire( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "producer-changed", NULL );
125 /** Create a new producer.
128 mlt_producer mlt_producer_new( )
130 mlt_producer this = malloc( sizeof( struct mlt_producer_s ) );
131 mlt_producer_init( this, NULL );
135 /** Determine if producer is a cut.
138 int mlt_producer_is_cut( mlt_producer this )
140 return mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "_cut" );
143 /** Determine if producer is a mix.
146 int mlt_producer_is_mix( mlt_producer this )
148 mlt_properties properties = this != NULL ? MLT_PRODUCER_PROPERTIES( this ) : NULL;
149 mlt_tractor tractor = properties != NULL ? mlt_properties_get_data( properties, "mlt_mix", NULL ) : NULL;
150 return tractor != NULL;
153 /** Determine if the producer is a blank [from a playlist].
156 int mlt_producer_is_blank( mlt_producer this )
158 return this == NULL || !strcmp( mlt_properties_get( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), "resource" ), "blank" );
161 /** Obtain the parent producer.
164 mlt_producer mlt_producer_cut_parent( mlt_producer this )
166 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
167 if ( mlt_producer_is_cut( this ) )
168 return mlt_properties_get_data( properties, "_cut_parent", NULL );
173 /** Create a cut of this producer
176 mlt_producer mlt_producer_cut( mlt_producer this, int in, int out )
178 mlt_producer result = mlt_producer_new( );
179 mlt_producer parent = mlt_producer_cut_parent( this );
180 mlt_properties properties = MLT_PRODUCER_PROPERTIES( result );
181 mlt_properties parent_props = MLT_PRODUCER_PROPERTIES( parent );
183 mlt_events_block( MLT_PRODUCER_PROPERTIES( result ), MLT_PRODUCER_PROPERTIES( result ) );
184 // Special case - allow for a cut of the entire producer (this will squeeze all other cuts to 0)
187 if ( ( out < 0 || out >= mlt_producer_get_length( parent ) ) && !mlt_producer_is_blank( this ) )
188 out = mlt_producer_get_length( parent ) - 1;
190 mlt_properties_inc_ref( parent_props );
191 mlt_properties_set_int( properties, "_cut", 1 );
192 mlt_properties_set_data( properties, "_cut_parent", parent, 0, ( mlt_destructor )mlt_producer_close, NULL );
193 mlt_properties_set_position( properties, "length", mlt_properties_get_position( parent_props, "length" ) );
194 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( parent_props, "aspect_ratio" ) );
195 mlt_producer_set_in_and_out( result, in, out );
200 /** Get the parent service object.
203 mlt_service mlt_producer_service( mlt_producer this )
205 return this != NULL ? &this->parent : NULL;
208 /** Get the producer properties.
211 mlt_properties mlt_producer_properties( mlt_producer this )
213 return MLT_SERVICE_PROPERTIES( &this->parent );
216 /** Seek to a specified position.
219 int mlt_producer_seek( mlt_producer this, mlt_position position )
221 // Determine eof handling
222 mlt_properties properties = MLT_PRODUCER_PROPERTIES( this );
223 char *eof = mlt_properties_get( properties, "eof" );
224 int use_points = 1 - mlt_properties_get_int( properties, "ignore_points" );
226 // Recursive behaviour for cuts - repositions parent and then repositions cut
227 // hence no return on this condition
228 if ( mlt_producer_is_cut( this ) )
229 mlt_producer_seek( mlt_producer_cut_parent( this ), position + mlt_producer_get_in( this ) );
232 if ( position < 0 || mlt_producer_get_playtime( this ) == 0 )
236 else if ( use_points && ( eof == NULL || !strcmp( eof, "pause" ) ) && position >= mlt_producer_get_playtime( this ) )
238 mlt_producer_set_speed( this, 0 );
239 position = mlt_producer_get_playtime( this ) - 1;
241 else if ( use_points && !strcmp( eof, "loop" ) && position >= mlt_producer_get_playtime( this ) )
243 position = (int)position % (int)mlt_producer_get_playtime( this );
247 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position );
249 // Calculate the absolute frame
250 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points * mlt_producer_get_in( this ) + position );
255 /** Get the current position (relative to in point).
258 mlt_position mlt_producer_position( mlt_producer this )
260 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
263 /** Get the current position (relative to start of producer).
266 mlt_position mlt_producer_frame( mlt_producer this )
268 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
271 /** Set the playing speed.
274 int mlt_producer_set_speed( mlt_producer this, double speed )
276 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed );
279 /** Get the playing speed.
282 double mlt_producer_get_speed( mlt_producer this )
284 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
287 /** Get the frames per second.
290 double mlt_producer_get_fps( mlt_producer this )
292 return mlt_profile_fps( NULL );
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( );
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( );
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" );
557 mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
559 if ( service != NULL )
560 clone = mlt_factory_producer( service, resource );
562 if ( clone == NULL && resource != NULL )
563 clone = mlt_factory_producer( "fezzik", resource );
566 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone ), properties );
568 mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
576 static void mlt_producer_set_clones( mlt_producer this, int clones )
578 mlt_producer parent = mlt_producer_cut_parent( this );
579 mlt_properties properties = MLT_PRODUCER_PROPERTIES( parent );
580 int existing = mlt_properties_get_int( properties, "_clones" );
584 // If the number of existing clones is different, then create/remove as necessary
585 if ( existing != clones )
587 if ( existing < clones )
589 for ( i = existing; i < clones; i ++ )
591 mlt_producer clone = mlt_producer_clone( parent );
592 sprintf( key, "_clone.%d", i );
593 mlt_properties_set_data( properties, key, clone, 0, ( mlt_destructor )mlt_producer_close, NULL );
598 for ( i = clones; i < existing; i ++ )
600 sprintf( key, "_clone.%d", i );
601 mlt_properties_set_data( properties, key, NULL, 0, NULL, NULL );
606 // Ensure all properties on the parent are passed to the clones
607 for ( i = 0; i < clones; i ++ )
609 mlt_producer clone = NULL;
610 sprintf( key, "_clone.%d", i );
611 clone = mlt_properties_get_data( properties, key, NULL );
613 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone ), properties, "" );
616 // Update the number of clones on the properties
617 mlt_properties_set_int( properties, "_clones", clones );
620 /** Optimise for overlapping cuts from the same clip.
641 static int intersect( clip_references *a, clip_references *b )
643 int diff = ( a->start - b->start ) + ( a->end - b->end );
644 return diff >= 0 && diff < ( a->end - a->start + 1 );
647 static int push( mlt_parser this, int multitrack, int track, int position )
649 mlt_properties properties = mlt_parser_properties( this );
650 mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
651 track_info *info = malloc( sizeof( track_info ) );
652 info->multitrack = multitrack;
654 info->position = position;
657 return mlt_deque_push_back( stack, info );
660 static track_info *pop( mlt_parser this )
662 mlt_properties properties = mlt_parser_properties( this );
663 mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
664 return mlt_deque_pop_back( stack );
667 static track_info *peek( mlt_parser this )
669 mlt_properties properties = mlt_parser_properties( this );
670 mlt_deque stack = mlt_properties_get_data( properties, "stack", NULL );
671 return mlt_deque_peek_back( stack );
674 static int on_start_multitrack( mlt_parser this, mlt_multitrack object )
676 track_info *info = peek( this );
677 return push( this, info->multitrack ++, info->track, info->position );
680 static int on_start_track( mlt_parser this )
682 track_info *info = peek( this );
683 info->position -= info->offset;
684 info->length -= info->offset;
685 return push( this, info->multitrack, info->track ++, info->position );
688 static int on_start_producer( mlt_parser this, mlt_producer object )
690 mlt_properties properties = mlt_parser_properties( this );
691 mlt_properties producers = mlt_properties_get_data( properties, "producers", NULL );
692 mlt_producer parent = mlt_producer_cut_parent( object );
693 if ( mlt_service_identify( ( mlt_service )mlt_producer_cut_parent( object ) ) == producer_type && mlt_producer_is_cut( object ) )
696 clip_references *old_refs = NULL;
697 clip_references *refs = NULL;
700 track_info *info = peek( this );
701 sprintf( key, "%p", parent );
702 mlt_properties_get_data( producers, key, &count );
703 mlt_properties_set_data( producers, key, parent, ++ count, NULL, NULL );
704 old_refs = mlt_properties_get_data( properties, key, &ref_count );
705 refs = malloc( ( ref_count + 1 ) * sizeof( clip_references ) );
706 if ( old_refs != NULL )
707 memcpy( refs, old_refs, ref_count * sizeof( clip_references ) );
708 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object ), "_clone", -1 );
709 refs[ ref_count ].cut = object;
710 refs[ ref_count ].start = info->position;
711 refs[ ref_count ].end = info->position + mlt_producer_get_playtime( object ) - 1;
712 mlt_properties_set_data( properties, key, refs, ++ ref_count, free, NULL );
713 info->position += mlt_producer_get_playtime( object );
714 info->length += mlt_producer_get_playtime( object );
719 static int on_end_track( mlt_parser this )
721 track_info *track = pop( this );
722 track_info *multi = peek( this );
723 multi->length += track->length;
724 multi->position += track->length;
725 multi->offset = track->length;
730 static int on_end_multitrack( mlt_parser this, mlt_multitrack object )
732 track_info *multi = pop( this );
733 track_info *track = peek( this );
734 track->position += multi->length;
735 track->length += multi->length;
740 int mlt_producer_optimise( mlt_producer this )
743 mlt_parser parser = mlt_parser_new( );
744 if ( parser != NULL )
746 int i = 0, j = 0, k = 0;
747 mlt_properties properties = mlt_parser_properties( parser );
748 mlt_properties producers = mlt_properties_new( );
749 mlt_deque stack = mlt_deque_init( );
750 mlt_properties_set_data( properties, "producers", producers, 0, ( mlt_destructor )mlt_properties_close, NULL );
751 mlt_properties_set_data( properties, "stack", stack, 0, ( mlt_destructor )mlt_deque_close, NULL );
752 parser->on_start_producer = on_start_producer;
753 parser->on_start_track = on_start_track;
754 parser->on_end_track = on_end_track;
755 parser->on_start_multitrack = on_start_multitrack;
756 parser->on_end_multitrack = on_end_multitrack;
757 push( parser, 0, 0, 0 );
758 mlt_parser_start( parser, MLT_PRODUCER_SERVICE( this ) );
759 free( pop( parser ) );
760 for ( k = 0; k < mlt_properties_count( producers ); k ++ )
762 char *name = mlt_properties_get_name( producers, k );
766 mlt_producer producer = mlt_properties_get_data( producers, name, &count );
767 if ( producer != NULL && count > 1 )
769 clip_references *refs = mlt_properties_get_data( properties, name, &count );
770 for ( i = 0; i < count; i ++ )
773 for ( j = i + 1; j < count; j ++ )
775 if ( intersect( &refs[ i ], &refs[ j ] ) )
778 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs[ j ].cut ), "_clone", clones );
781 if ( clones > max_clones )
785 for ( i = 0; i < count; i ++ )
787 mlt_producer cut = refs[ i ].cut;
788 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone" ) == -1 )
789 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone", 0 );
792 mlt_producer_set_clones( producer, max_clones );
794 else if ( producer != NULL )
796 clip_references *refs = mlt_properties_get_data( properties, name, &count );
797 for ( i = 0; i < count; i ++ )
799 mlt_producer cut = refs[ i ].cut;
800 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut ), "_clone", 0 );
802 mlt_producer_set_clones( producer, 0 );
805 mlt_parser_close( parser );
810 /** Close the producer.
813 void mlt_producer_close( mlt_producer this )
815 if ( this != NULL && mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
817 this->parent.close = NULL;
819 if ( this->close != NULL )
821 this->close( this->close_object );
825 int destroy = mlt_producer_is_cut( this );
827 #if _MLT_PRODUCER_CHECKS_ == 1
829 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr );
832 #ifdef _MLT_PRODUCER_CHECKS_
833 // Increment destroyed count
834 producers_destroyed ++;
836 // Show current stats - these should match when the app is closed
837 fprintf( stderr, "Producers created %d, destroyed %d\n", producers_created, producers_destroyed );
840 mlt_service_close( &this->parent );