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_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( parent_props
, "aspect_ratio" ) );
209 mlt_producer_set_in_and_out( result
, in
, out
);
212 mlt_filter filter
= mlt_factory_filter( "data_feed", "attr_check" );
213 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter
), "_fezzik", 1 );
214 mlt_producer_attach( result
, filter
);
215 mlt_filter_close( filter
);
220 /** Get the parent service object.
223 mlt_service
mlt_producer_service( mlt_producer
this )
225 return this != NULL ?
&this->parent
: NULL
;
228 /** Get the producer properties.
231 mlt_properties
mlt_producer_properties( mlt_producer
this )
233 return MLT_SERVICE_PROPERTIES( &this->parent
);
236 /** Seek to a specified position.
239 int mlt_producer_seek( mlt_producer
this, mlt_position position
)
241 // Determine eof handling
242 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
243 char *eof
= mlt_properties_get( properties
, "eof" );
244 int use_points
= 1 - mlt_properties_get_int( properties
, "ignore_points" );
246 // Recursive behaviour for cuts - repositions parent and then repositions cut
247 // hence no return on this condition
248 if ( mlt_producer_is_cut( this ) )
249 mlt_producer_seek( mlt_producer_cut_parent( this ), position
+ mlt_producer_get_in( this ) );
252 if ( position
< 0 || mlt_producer_get_playtime( this ) == 0 )
256 else if ( use_points
&& !strcmp( eof
, "pause" ) && position
>= mlt_producer_get_playtime( this ) )
258 mlt_producer_set_speed( this, 0 );
259 position
= mlt_producer_get_playtime( this ) - 1;
261 else if ( use_points
&& !strcmp( eof
, "loop" ) && position
>= mlt_producer_get_playtime( this ) )
263 position
= position
% mlt_producer_get_playtime( this );
267 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_position", position
);
269 // Calculate the absolute frame
270 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "_frame", use_points
* mlt_producer_get_in( this ) + position
);
275 /** Get the current position (relative to in point).
278 mlt_position
mlt_producer_position( mlt_producer
this )
280 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_position" );
283 /** Get the current position (relative to start of producer).
286 mlt_position
mlt_producer_frame( mlt_producer
this )
288 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "_frame" );
291 /** Set the playing speed.
294 int mlt_producer_set_speed( mlt_producer
this, double speed
)
296 return mlt_properties_set_double( MLT_PRODUCER_PROPERTIES( this ), "_speed", speed
);
299 /** Get the playing speed.
302 double mlt_producer_get_speed( mlt_producer
this )
304 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "_speed" );
307 /** Get the frames per second.
310 double mlt_producer_get_fps( mlt_producer
this )
312 return mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "fps" );
315 /** Set the in and out points.
318 int mlt_producer_set_in_and_out( mlt_producer
this, mlt_position in
, mlt_position out
)
320 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
322 // Correct ins and outs if necessary
325 else if ( in
>= mlt_producer_get_length( this ) )
326 in
= mlt_producer_get_length( this ) - 1;
330 else if ( out
>= mlt_producer_get_length( this ) && !mlt_producer_is_blank( this ) )
331 out
= mlt_producer_get_length( this ) - 1;
332 else if ( out
>= mlt_producer_get_length( this ) && mlt_producer_is_blank( this ) )
333 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( this ), "length", out
+ 1 );
335 // Swap ins and outs if wrong
344 mlt_events_block( properties
, properties
);
345 mlt_properties_set_position( properties
, "in", in
);
346 mlt_events_unblock( properties
, properties
);
347 mlt_properties_set_position( properties
, "out", out
);
352 /** Physically reduce the producer (typically a cut) to a 0 length.
353 Essentially, all 0 length cuts should be immediately removed by containers.
356 int mlt_producer_clear( mlt_producer
this )
360 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
361 mlt_events_block( properties
, properties
);
362 mlt_properties_set_position( properties
, "in", 0 );
363 mlt_events_unblock( properties
, properties
);
364 mlt_properties_set_position( properties
, "out", -1 );
369 /** Get the in point.
372 mlt_position
mlt_producer_get_in( mlt_producer
this )
374 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "in" );
377 /** Get the out point.
380 mlt_position
mlt_producer_get_out( mlt_producer
this )
382 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "out" );
385 /** Get the total play time.
388 mlt_position
mlt_producer_get_playtime( mlt_producer
this )
390 return mlt_producer_get_out( this ) - mlt_producer_get_in( this ) + 1;
393 /** Get the total length of the producer.
396 mlt_position
mlt_producer_get_length( mlt_producer
this )
398 return mlt_properties_get_position( MLT_PRODUCER_PROPERTIES( this ), "length" );
401 /** Prepare for next frame.
404 void mlt_producer_prepare_next( mlt_producer
this )
406 if ( mlt_producer_get_speed( this ) != 0 )
407 mlt_producer_seek( this, mlt_producer_position( this ) + mlt_producer_get_speed( this ) );
413 static int producer_get_frame( mlt_service service
, mlt_frame_ptr frame
, int index
)
416 mlt_producer
this = service
!= NULL ? service
->child
: NULL
;
418 if ( this != NULL
&& !mlt_producer_is_cut( this ) )
420 // Get the properties of this producer
421 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
423 // Determine eof handling
424 char *eof
= mlt_properties_get( MLT_PRODUCER_PROPERTIES( this ), "eof" );
426 // Get the speed of the producer
427 double speed
= mlt_producer_get_speed( this );
429 // We need to use the clone if it's specified
430 mlt_producer clone
= mlt_properties_get_data( properties
, "use_clone", NULL
);
432 // If no clone is specified, use this
433 clone
= clone
== NULL ?
this : clone
;
435 // A properly instatiated producer will have a get_frame method...
436 if ( this->get_frame
== NULL
|| ( !strcmp( eof
, "continue" ) && mlt_producer_position( this ) > mlt_producer_get_out( this ) ) )
438 // Generate a test frame
439 *frame
= mlt_frame_init( );
442 result
= mlt_frame_set_position( *frame
, mlt_producer_position( this ) );
444 // Mark as a test card
445 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_image", 1 );
446 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "test_audio", 1 );
448 // Calculate the next position
449 mlt_producer_prepare_next( this );
453 // Get the frame from the implementation
454 result
= this->get_frame( clone
, frame
, index
);
457 // Copy the fps and speed of the producer onto the frame
458 properties
= MLT_FRAME_PROPERTIES( *frame
);
459 mlt_properties_set_double( properties
, "_speed", speed
);
460 mlt_properties_set_double( properties
, "fps", mlt_producer_get_fps( this ) );
461 mlt_properties_set_int( properties
, "test_audio", mlt_frame_is_test_audio( *frame
) );
462 mlt_properties_set_int( properties
, "test_image", mlt_frame_is_test_card( *frame
) );
463 if ( mlt_properties_get_data( properties
, "_producer", NULL
) == NULL
)
464 mlt_properties_set_data( properties
, "_producer", service
, 0, NULL
, NULL
);
466 else if ( this != NULL
)
468 // Get the speed of the cut
469 double speed
= mlt_producer_get_speed( this );
471 // Get the parent of this cut
472 mlt_producer parent
= mlt_producer_cut_parent( this );
474 // Get the properties of the parent
475 mlt_properties parent_properties
= MLT_PRODUCER_PROPERTIES( parent
);
477 // Get the properties of the cut
478 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
480 // Determine the clone index
481 int clone_index
= mlt_properties_get_int( properties
, "_clone" );
483 // Determine the clone to use
484 mlt_producer clone
= this;
486 if ( clone_index
> 0 )
489 sprintf( key
, "_clone.%d", clone_index
- 1 );
490 clone
= mlt_properties_get_data( MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( this ) ), key
, NULL
);
491 if ( clone
== NULL
) fprintf( stderr
, "requested clone doesn't exist %d\n", clone_index
);
492 clone
= clone
== NULL ?
this : clone
;
499 // We need to seek to the correct position in the clone
500 mlt_producer_seek( clone
, mlt_producer_get_in( this ) + mlt_properties_get_int( properties
, "_position" ) );
502 // Assign the clone property to the parent
503 mlt_properties_set_data( parent_properties
, "use_clone", clone
, 0, NULL
, NULL
);
505 // Now get the frame from the parents service
506 result
= mlt_service_get_frame( MLT_PRODUCER_SERVICE( parent
), frame
, index
);
508 // We're done with the clone now
509 mlt_properties_set_data( parent_properties
, "use_clone", NULL
, 0, NULL
, NULL
);
511 // This is useful and required by always_active transitions to determine in/out points of the cut
512 if ( mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame
), "_producer", NULL
) == MLT_PRODUCER_SERVICE( parent
) )
513 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame
), "_producer", this, 0, NULL
, NULL
);
515 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame
), "_speed", speed
);
516 mlt_producer_prepare_next( this );
520 *frame
= mlt_frame_init( );
524 // Pass on all meta properties from the producer/cut on to the frame
525 if ( *frame
!= NULL
&& this != NULL
)
528 mlt_properties p_props
= MLT_PRODUCER_PROPERTIES( this );
529 mlt_properties f_props
= MLT_FRAME_PROPERTIES( *frame
);
530 int count
= mlt_properties_count( p_props
);
531 for ( i
= 0; i
< count
; i
++ )
533 char *name
= mlt_properties_get_name( p_props
, i
);
534 if ( !strncmp( name
, "meta.", 5 ) )
535 mlt_properties_set( f_props
, name
, mlt_properties_get( p_props
, name
) );
536 else if ( !strncmp( name
, "set.", 4 ) )
537 mlt_properties_set( f_props
, name
+ 4, mlt_properties_get( p_props
, name
) );
547 int mlt_producer_attach( mlt_producer
this, mlt_filter filter
)
549 return mlt_service_attach( MLT_PRODUCER_SERVICE( this ), filter
);
555 int mlt_producer_detach( mlt_producer
this, mlt_filter filter
)
557 return mlt_service_detach( MLT_PRODUCER_SERVICE( this ), filter
);
560 /** Retrieve a filter.
563 mlt_filter
mlt_producer_filter( mlt_producer
this, int index
)
565 return mlt_service_filter( MLT_PRODUCER_SERVICE( this ), index
);
568 /** Clone this producer.
571 static mlt_producer
mlt_producer_clone( mlt_producer
this )
573 mlt_producer clone
= NULL
;
574 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
575 char *resource
= mlt_properties_get( properties
, "resource" );
576 char *service
= mlt_properties_get( properties
, "mlt_service" );
578 mlt_events_block( mlt_factory_event_object( ), mlt_factory_event_object( ) );
580 if ( service
!= NULL
)
581 clone
= mlt_factory_producer( service
, resource
);
583 if ( clone
== NULL
&& resource
!= NULL
)
584 clone
= mlt_factory_producer( "fezzik", resource
);
587 mlt_properties_inherit( MLT_PRODUCER_PROPERTIES( clone
), properties
);
589 mlt_events_unblock( mlt_factory_event_object( ), mlt_factory_event_object( ) );
597 static void mlt_producer_set_clones( mlt_producer
this, int clones
)
599 mlt_producer parent
= mlt_producer_cut_parent( this );
600 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( parent
);
601 int existing
= mlt_properties_get_int( properties
, "_clones" );
605 // If the number of existing clones is different, then create/remove as necessary
606 if ( existing
!= clones
)
608 if ( existing
< clones
)
610 for ( i
= existing
; i
< clones
; i
++ )
612 mlt_producer clone
= mlt_producer_clone( parent
);
613 sprintf( key
, "_clone.%d", i
);
614 mlt_properties_set_data( properties
, key
, clone
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
619 for ( i
= clones
; i
< existing
; i
++ )
621 sprintf( key
, "_clone.%d", i
);
622 mlt_properties_set_data( properties
, key
, NULL
, 0, NULL
, NULL
);
627 // Ensure all properties on the parent are passed to the clones
628 for ( i
= 0; i
< clones
; i
++ )
630 mlt_producer clone
= NULL
;
631 sprintf( key
, "_clone.%d", i
);
632 clone
= mlt_properties_get_data( properties
, key
, NULL
);
634 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( clone
), properties
, "" );
637 // Update the number of clones on the properties
638 mlt_properties_set_int( properties
, "_clones", clones
);
641 /** Optimise for overlapping cuts from the same clip.
662 static int intersect( clip_references
*a
, clip_references
*b
)
664 int diff
= ( a
->start
- b
->start
) + ( a
->end
- b
->end
);
665 return diff
>= 0 && diff
< ( a
->end
- a
->start
+ 1 );
668 static int push( mlt_parser
this, int multitrack
, int track
, int position
)
670 mlt_properties properties
= mlt_parser_properties( this );
671 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
672 track_info
*info
= malloc( sizeof( track_info
) );
673 info
->multitrack
= multitrack
;
675 info
->position
= position
;
678 return mlt_deque_push_back( stack
, info
);
681 static track_info
*pop( mlt_parser
this )
683 mlt_properties properties
= mlt_parser_properties( this );
684 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
685 return mlt_deque_pop_back( stack
);
688 static track_info
*peek( mlt_parser
this )
690 mlt_properties properties
= mlt_parser_properties( this );
691 mlt_deque stack
= mlt_properties_get_data( properties
, "stack", NULL
);
692 return mlt_deque_peek_back( stack
);
695 static int on_start_multitrack( mlt_parser
this, mlt_multitrack object
)
697 track_info
*info
= peek( this );
698 return push( this, info
->multitrack
++, info
->track
, info
->position
);
701 static int on_start_track( mlt_parser
this )
703 track_info
*info
= peek( this );
704 info
->position
-= info
->offset
;
705 info
->length
-= info
->offset
;
706 return push( this, info
->multitrack
, info
->track
++, info
->position
);
709 static int on_start_producer( mlt_parser
this, mlt_producer object
)
711 mlt_properties properties
= mlt_parser_properties( this );
712 mlt_properties producers
= mlt_properties_get_data( properties
, "producers", NULL
);
713 mlt_producer parent
= mlt_producer_cut_parent( object
);
714 if ( mlt_service_identify( ( mlt_service
)mlt_producer_cut_parent( object
) ) == producer_type
&& mlt_producer_is_cut( object
) )
717 clip_references
*old_refs
= NULL
;
718 clip_references
*refs
= NULL
;
721 track_info
*info
= peek( this );
722 sprintf( key
, "%p", parent
);
723 mlt_properties_get_data( producers
, key
, &count
);
724 mlt_properties_set_data( producers
, key
, parent
, ++ count
, NULL
, NULL
);
725 old_refs
= mlt_properties_get_data( properties
, key
, &ref_count
);
726 refs
= malloc( ( ref_count
+ 1 ) * sizeof( clip_references
) );
727 if ( old_refs
!= NULL
)
728 memcpy( refs
, old_refs
, ref_count
* sizeof( clip_references
) );
729 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( object
), "_clone", -1 );
730 refs
[ ref_count
].cut
= object
;
731 refs
[ ref_count
].start
= info
->position
;
732 refs
[ ref_count
].end
= info
->position
+ mlt_producer_get_playtime( object
) - 1;
733 mlt_properties_set_data( properties
, key
, refs
, ++ ref_count
, free
, NULL
);
734 info
->position
+= mlt_producer_get_playtime( object
);
735 info
->length
+= mlt_producer_get_playtime( object
);
740 static int on_end_track( mlt_parser
this )
742 track_info
*track
= pop( this );
743 track_info
*multi
= peek( this );
744 multi
->length
+= track
->length
;
745 multi
->position
+= track
->length
;
746 multi
->offset
= track
->length
;
751 static int on_end_multitrack( mlt_parser
this, mlt_multitrack object
)
753 track_info
*multi
= pop( this );
754 track_info
*track
= peek( this );
755 track
->position
+= multi
->length
;
756 track
->length
+= multi
->length
;
761 int mlt_producer_optimise( mlt_producer
this )
764 mlt_parser parser
= mlt_parser_new( );
765 if ( parser
!= NULL
)
767 int i
= 0, j
= 0, k
= 0;
768 mlt_properties properties
= mlt_parser_properties( parser
);
769 mlt_properties producers
= mlt_properties_new( );
770 mlt_deque stack
= mlt_deque_init( );
771 mlt_properties_set_data( properties
, "producers", producers
, 0, ( mlt_destructor
)mlt_properties_close
, NULL
);
772 mlt_properties_set_data( properties
, "stack", stack
, 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
773 parser
->on_start_producer
= on_start_producer
;
774 parser
->on_start_track
= on_start_track
;
775 parser
->on_end_track
= on_end_track
;
776 parser
->on_start_multitrack
= on_start_multitrack
;
777 parser
->on_end_multitrack
= on_end_multitrack
;
778 push( parser
, 0, 0, 0 );
779 mlt_parser_start( parser
, MLT_PRODUCER_SERVICE( this ) );
780 free( pop( parser
) );
781 for ( k
= 0; k
< mlt_properties_count( producers
); k
++ )
783 char *name
= mlt_properties_get_name( producers
, k
);
787 mlt_producer producer
= mlt_properties_get_data( producers
, name
, &count
);
788 if ( producer
!= NULL
&& count
> 1 )
790 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
791 for ( i
= 0; i
< count
; i
++ )
794 for ( j
= i
+ 1; j
< count
; j
++ )
796 if ( intersect( &refs
[ i
], &refs
[ j
] ) )
799 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( refs
[ j
].cut
), "_clone", clones
);
802 if ( clones
> max_clones
)
806 for ( i
= 0; i
< count
; i
++ )
808 mlt_producer cut
= refs
[ i
].cut
;
809 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone" ) == -1 )
810 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
813 mlt_producer_set_clones( producer
, max_clones
);
815 else if ( producer
!= NULL
)
817 clip_references
*refs
= mlt_properties_get_data( properties
, name
, &count
);
818 for ( i
= 0; i
< count
; i
++ )
820 mlt_producer cut
= refs
[ i
].cut
;
821 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( cut
), "_clone", 0 );
823 mlt_producer_set_clones( producer
, 0 );
826 mlt_parser_close( parser
);
831 /** Close the producer.
834 void mlt_producer_close( mlt_producer
this )
836 if ( this != NULL
&& mlt_properties_dec_ref( MLT_PRODUCER_PROPERTIES( this ) ) <= 0 )
838 this->parent
.close
= NULL
;
840 if ( this->close
!= NULL
)
842 this->close( this->close_object
);
846 int destroy
= mlt_producer_is_cut( this );
848 #if _MLT_PRODUCER_CHECKS_ == 1
850 mlt_properties_debug( MLT_PRODUCER_PROPERTIES( this ), "Producer closing", stderr
);
853 #ifdef _MLT_PRODUCER_CHECKS_
854 // Increment destroyed count
855 producers_destroyed
++;
857 // Show current stats - these should match when the app is closed
858 fprintf( stderr
, "Producers created %d, destroyed %d\n", producers_created
, producers_destroyed
);
861 mlt_service_close( &this->parent
);