2 * mlt_playlist.c -- playlist service class
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
23 #include "mlt_playlist.h"
24 #include "mlt_tractor.h"
25 #include "mlt_multitrack.h"
26 #include "mlt_field.h"
27 #include "mlt_frame.h"
28 #include "mlt_transition.h"
34 /** Virtual playlist entry.
37 struct playlist_entry_s
39 mlt_producer producer
;
40 mlt_position frame_in
;
41 mlt_position frame_out
;
42 mlt_position frame_count
;
44 mlt_position producer_length
;
46 int preservation_hack
;
49 /** Forward declarations
52 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
53 static int mlt_playlist_unmix( mlt_playlist
this, int clip
);
54 static int mlt_playlist_resize_mix( mlt_playlist
this, int clip
, int in
, int out
);
59 mlt_playlist
mlt_playlist_init( )
61 mlt_playlist
this = calloc( sizeof( struct mlt_playlist_s
), 1 );
64 mlt_producer producer
= &this->parent
;
66 // Construct the producer
67 mlt_producer_init( producer
, this );
69 // Override the producer get_frame
70 producer
->get_frame
= producer_get_frame
;
72 // Define the destructor
73 producer
->close
= ( mlt_destructor
)mlt_playlist_close
;
74 producer
->close_object
= this;
77 mlt_producer_init( &this->blank
, NULL
);
78 mlt_properties_set( MLT_PRODUCER_PROPERTIES( &this->blank
), "mlt_service", "blank" );
79 mlt_properties_set( MLT_PRODUCER_PROPERTIES( &this->blank
), "resource", "blank" );
81 // Indicate that this producer is a playlist
82 mlt_properties_set_data( MLT_PLAYLIST_PROPERTIES( this ), "playlist", this, 0, NULL
, NULL
);
84 // Specify the eof condition
85 mlt_properties_set( MLT_PLAYLIST_PROPERTIES( this ), "eof", "pause" );
86 mlt_properties_set( MLT_PLAYLIST_PROPERTIES( this ), "resource", "<playlist>" );
87 mlt_properties_set( MLT_PLAYLIST_PROPERTIES( this ), "mlt_type", "mlt_producer" );
88 mlt_properties_set_position( MLT_PLAYLIST_PROPERTIES( this ), "in", 0 );
89 mlt_properties_set_position( MLT_PLAYLIST_PROPERTIES( this ), "out", -1 );
90 mlt_properties_set_position( MLT_PLAYLIST_PROPERTIES( this ), "length", 0 );
93 this->list
= malloc( this->size
* sizeof( playlist_entry
* ) );
99 /** Get the producer associated to this playlist.
102 mlt_producer
mlt_playlist_producer( mlt_playlist
this )
104 return this != NULL ?
&this->parent
: NULL
;
107 /** Get the service associated to this playlist.
110 mlt_service
mlt_playlist_service( mlt_playlist
this )
112 return MLT_PRODUCER_SERVICE( &this->parent
);
115 /** Get the propertues associated to this playlist.
118 mlt_properties
mlt_playlist_properties( mlt_playlist
this )
120 return MLT_PRODUCER_PROPERTIES( &this->parent
);
123 /** Refresh the playlist after a clip has been changed.
126 static int mlt_playlist_virtual_refresh( mlt_playlist
this )
128 // Obtain the properties
129 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
131 mlt_position frame_count
= 0;
133 for ( i
= 0; i
< this->count
; i
++ )
136 mlt_producer producer
= this->list
[ i
]->producer
;
137 int current_length
= mlt_producer_get_out( producer
) - mlt_producer_get_in( producer
) + 1;
139 // Check if the length of the producer has changed
140 if ( this->list
[ i
]->frame_in
!= mlt_producer_get_in( producer
) ||
141 this->list
[ i
]->frame_out
!= mlt_producer_get_out( producer
) )
143 // This clip should be removed...
144 if ( current_length
< 1 )
146 this->list
[ i
]->frame_in
= 0;
147 this->list
[ i
]->frame_out
= -1;
148 this->list
[ i
]->frame_count
= 0;
152 this->list
[ i
]->frame_in
= mlt_producer_get_in( producer
);
153 this->list
[ i
]->frame_out
= mlt_producer_get_out( producer
);
154 this->list
[ i
]->frame_count
= current_length
;
157 // Update the producer_length
158 this->list
[ i
]->producer_length
= current_length
;
161 // Calculate the frame_count
162 this->list
[ i
]->frame_count
= ( this->list
[ i
]->frame_out
- this->list
[ i
]->frame_in
+ 1 ) * this->list
[ i
]->repeat
;
164 // Update the frame_count for this clip
165 frame_count
+= this->list
[ i
]->frame_count
;
168 // Refresh all properties
169 mlt_events_block( properties
, properties
);
170 mlt_properties_set_position( properties
, "length", frame_count
);
171 mlt_events_unblock( properties
, properties
);
172 mlt_properties_set_position( properties
, "out", frame_count
- 1 );
177 /** Listener for producers on the playlist.
180 static void mlt_playlist_listener( mlt_producer producer
, mlt_playlist
this )
182 mlt_playlist_virtual_refresh( this );
185 /** Append to the virtual playlist.
188 static int mlt_playlist_virtual_append( mlt_playlist
this, mlt_producer source
, mlt_position in
, mlt_position out
)
190 mlt_producer producer
= NULL
;
191 mlt_properties properties
= NULL
;
192 mlt_properties parent
= NULL
;
194 // If we have a cut, then use the in/out points from the cut
195 if ( mlt_producer_is_blank( source
) )
197 // Make sure the blank is long enough to accomodate the length specified
198 if ( out
- in
+ 1 > mlt_producer_get_length( &this->blank
) )
200 mlt_properties blank_props
= MLT_PRODUCER_PROPERTIES( &this->blank
);
201 mlt_events_block( blank_props
, blank_props
);
202 mlt_producer_set_in_and_out( &this->blank
, in
, out
);
203 mlt_events_unblock( blank_props
, blank_props
);
206 // Now make sure the cut comes from this this->blank
207 if ( source
== NULL
)
209 producer
= mlt_producer_cut( &this->blank
, in
, out
);
211 else if ( !mlt_producer_is_cut( source
) || mlt_producer_cut_parent( source
) != &this->blank
)
213 producer
= mlt_producer_cut( &this->blank
, in
, out
);
218 mlt_properties_inc_ref( MLT_PRODUCER_PROPERTIES( producer
) );
221 properties
= MLT_PRODUCER_PROPERTIES( producer
);
223 else if ( mlt_producer_is_cut( source
) )
227 in
= mlt_producer_get_in( producer
);
228 if ( out
== -1 || out
> mlt_producer_get_out( producer
) )
229 out
= mlt_producer_get_out( producer
);
230 properties
= MLT_PRODUCER_PROPERTIES( producer
);
231 mlt_properties_inc_ref( properties
);
235 producer
= mlt_producer_cut( source
, in
, out
);
236 if ( in
== -1 || in
< mlt_producer_get_in( producer
) )
237 in
= mlt_producer_get_in( producer
);
238 if ( out
== -1 || out
> mlt_producer_get_out( producer
) )
239 out
= mlt_producer_get_out( producer
);
240 properties
= MLT_PRODUCER_PROPERTIES( producer
);
243 // Fetch the cuts parent properties
244 parent
= MLT_PRODUCER_PROPERTIES( mlt_producer_cut_parent( producer
) );
246 // Remove fezzik normalisers for fx cuts
247 if ( mlt_properties_get_int( parent
, "meta.fx_cut" ) )
249 mlt_service service
= MLT_PRODUCER_SERVICE( mlt_producer_cut_parent( producer
) );
250 mlt_filter filter
= mlt_service_filter( service
, 0 );
251 while ( filter
!= NULL
&& mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter
), "_fezzik" ) )
253 mlt_service_detach( service
, filter
);
254 filter
= mlt_service_filter( service
, 0 );
256 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( producer
), "meta.fx_cut", 1 );
259 // Check that we have room
260 if ( this->count
>= this->size
)
263 this->list
= realloc( this->list
, ( this->size
+ 10 ) * sizeof( playlist_entry
* ) );
264 for ( i
= this->size
; i
< this->size
+ 10; i
++ ) this->list
[ i
] = NULL
;
269 this->list
[ this->count
] = calloc( sizeof( playlist_entry
), 1 );
270 if ( this->list
[ this->count
] != NULL
)
272 this->list
[ this->count
]->producer
= producer
;
273 this->list
[ this->count
]->frame_in
= in
;
274 this->list
[ this->count
]->frame_out
= out
;
275 this->list
[ this->count
]->frame_count
= out
- in
+ 1;
276 this->list
[ this->count
]->repeat
= 1;
277 this->list
[ this->count
]->producer_length
= mlt_producer_get_out( producer
) - mlt_producer_get_in( producer
) + 1;
278 this->list
[ this->count
]->event
= mlt_events_listen( parent
, this, "producer-changed", ( mlt_listener
)mlt_playlist_listener
);
279 mlt_event_inc_ref( this->list
[ this->count
]->event
);
280 mlt_properties_set( properties
, "eof", "pause" );
281 mlt_producer_set_speed( producer
, 0 );
285 return mlt_playlist_virtual_refresh( this );
288 static mlt_producer
mlt_playlist_locate( mlt_playlist
this, mlt_position
*position
, int *clip
, int *total
)
290 // Default producer to NULL
291 mlt_producer producer
= NULL
;
293 // Loop for each producer until found
294 for ( *clip
= 0; *clip
< this->count
; *clip
+= 1 )
296 // Increment the total
297 *total
+= this->list
[ *clip
]->frame_count
;
299 // Check if the position indicates that we have found the clip
300 // Note that 0 length clips get skipped automatically
301 if ( *position
< this->list
[ *clip
]->frame_count
)
303 // Found it, now break
304 producer
= this->list
[ *clip
]->producer
;
309 // Decrement position by length of this entry
310 *position
-= this->list
[ *clip
]->frame_count
;
317 /** Seek in the virtual playlist.
320 static mlt_service
mlt_playlist_virtual_seek( mlt_playlist
this, int *progressive
)
322 // Map playlist position to real producer in virtual playlist
323 mlt_position position
= mlt_producer_frame( &this->parent
);
325 // Keep the original position since we change it while iterating through the list
326 mlt_position original
= position
;
328 // Clip index and total
332 // Locate the producer for the position
333 mlt_producer producer
= mlt_playlist_locate( this, &position
, &i
, &total
);
335 // Get the properties
336 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
338 // Get the eof handling
339 char *eof
= mlt_properties_get( properties
, "eof" );
341 // Seek in real producer to relative position
342 if ( producer
!= NULL
)
344 int count
= this->list
[ i
]->frame_count
/ this->list
[ i
]->repeat
;
345 *progressive
= count
== 1;
346 mlt_producer_seek( producer
, (int)position
% count
);
348 else if ( !strcmp( eof
, "pause" ) && total
> 0 )
350 playlist_entry
*entry
= this->list
[ this->count
- 1 ];
351 int count
= entry
->frame_count
/ entry
->repeat
;
352 mlt_producer this_producer
= MLT_PLAYLIST_PRODUCER( this );
353 mlt_producer_seek( this_producer
, original
- 1 );
354 producer
= entry
->producer
;
355 mlt_producer_seek( producer
, (int)entry
->frame_out
% count
);
356 mlt_producer_set_speed( this_producer
, 0 );
357 mlt_producer_set_speed( producer
, 0 );
358 *progressive
= count
== 1;
360 else if ( !strcmp( eof
, "loop" ) && total
> 0 )
362 playlist_entry
*entry
= this->list
[ 0 ];
363 mlt_producer this_producer
= MLT_PLAYLIST_PRODUCER( this );
364 mlt_producer_seek( this_producer
, 0 );
365 producer
= entry
->producer
;
366 mlt_producer_seek( producer
, 0 );
370 producer
= &this->blank
;
373 return MLT_PRODUCER_SERVICE( producer
);
376 /** Invoked when a producer indicates that it has prematurely reached its end.
379 static mlt_producer
mlt_playlist_virtual_set_out( mlt_playlist
this )
381 // Default producer to blank
382 mlt_producer producer
= &this->blank
;
384 // Map playlist position to real producer in virtual playlist
385 mlt_position position
= mlt_producer_frame( &this->parent
);
387 // Loop through the virtual playlist
390 for ( i
= 0; i
< this->count
; i
++ )
392 if ( position
< this->list
[ i
]->frame_count
)
394 // Found it, now break
395 producer
= this->list
[ i
]->producer
;
400 // Decrement position by length of this entry
401 position
-= this->list
[ i
]->frame_count
;
405 // Seek in real producer to relative position
406 if ( i
< this->count
&& this->list
[ i
]->frame_out
!= position
)
408 // Update the frame_count for the changed clip (hmmm)
409 this->list
[ i
]->frame_out
= position
;
410 this->list
[ i
]->frame_count
= this->list
[ i
]->frame_out
- this->list
[ i
]->frame_in
+ 1;
412 // Refresh the playlist
413 mlt_playlist_virtual_refresh( this );
419 /** Obtain the current clips index.
422 int mlt_playlist_current_clip( mlt_playlist
this )
424 // Map playlist position to real producer in virtual playlist
425 mlt_position position
= mlt_producer_frame( &this->parent
);
427 // Loop through the virtual playlist
430 for ( i
= 0; i
< this->count
; i
++ )
432 if ( position
< this->list
[ i
]->frame_count
)
434 // Found it, now break
439 // Decrement position by length of this entry
440 position
-= this->list
[ i
]->frame_count
;
447 /** Obtain the current clips producer.
450 mlt_producer
mlt_playlist_current( mlt_playlist
this )
452 int i
= mlt_playlist_current_clip( this );
453 if ( i
< this->count
)
454 return this->list
[ i
]->producer
;
459 /** Get the position which corresponds to the start of the next clip.
462 mlt_position
mlt_playlist_clip( mlt_playlist
this, mlt_whence whence
, int index
)
464 mlt_position position
= 0;
465 int absolute_clip
= index
;
468 // Determine the absolute clip
471 case mlt_whence_relative_start
:
472 absolute_clip
= index
;
475 case mlt_whence_relative_current
:
476 absolute_clip
= mlt_playlist_current_clip( this ) + index
;
479 case mlt_whence_relative_end
:
480 absolute_clip
= this->count
- index
;
484 // Check that we're in a valid range
485 if ( absolute_clip
< 0 )
487 else if ( absolute_clip
> this->count
)
488 absolute_clip
= this->count
;
490 // Now determine the position
491 for ( i
= 0; i
< absolute_clip
; i
++ )
492 position
+= this->list
[ i
]->frame_count
;
497 /** Get all the info about the clip specified.
500 int mlt_playlist_get_clip_info( mlt_playlist
this, mlt_playlist_clip_info
*info
, int index
)
502 int error
= index
< 0 || index
>= this->count
;
503 memset( info
, 0, sizeof( mlt_playlist_clip_info
) );
506 mlt_producer producer
= mlt_producer_cut_parent( this->list
[ index
]->producer
);
507 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
509 info
->producer
= producer
;
510 info
->cut
= this->list
[ index
]->producer
;
511 info
->start
= mlt_playlist_clip( this, mlt_whence_relative_start
, index
);
512 info
->resource
= mlt_properties_get( properties
, "resource" );
513 info
->frame_in
= this->list
[ index
]->frame_in
;
514 info
->frame_out
= this->list
[ index
]->frame_out
;
515 info
->frame_count
= this->list
[ index
]->frame_count
;
516 info
->repeat
= this->list
[ index
]->repeat
;
517 info
->length
= mlt_producer_get_length( producer
);
518 info
->fps
= mlt_producer_get_fps( producer
);
524 /** Get number of clips in the playlist.
527 int mlt_playlist_count( mlt_playlist
this )
532 /** Clear the playlist.
535 int mlt_playlist_clear( mlt_playlist
this )
538 for ( i
= 0; i
< this->count
; i
++ )
540 mlt_event_close( this->list
[ i
]->event
);
541 mlt_producer_close( this->list
[ i
]->producer
);
544 return mlt_playlist_virtual_refresh( this );
547 /** Append a producer to the playlist.
550 int mlt_playlist_append( mlt_playlist
this, mlt_producer producer
)
552 // Append to virtual list
553 return mlt_playlist_virtual_append( this, producer
, 0, mlt_producer_get_playtime( producer
) - 1 );
556 /** Append a producer to the playlist with in/out points.
559 int mlt_playlist_append_io( mlt_playlist
this, mlt_producer producer
, mlt_position in
, mlt_position out
)
561 // Append to virtual list
562 if ( in
!= -1 && out
!= -1 )
563 return mlt_playlist_virtual_append( this, producer
, in
, out
);
565 return mlt_playlist_append( this, producer
);
568 /** Append a blank to the playlist of a given length.
571 int mlt_playlist_blank( mlt_playlist
this, mlt_position length
)
573 // Append to the virtual list
574 return mlt_playlist_virtual_append( this, &this->blank
, 0, length
);
577 /** Insert a producer into the playlist.
580 int mlt_playlist_insert( mlt_playlist
this, mlt_producer producer
, int where
, mlt_position in
, mlt_position out
)
583 mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
584 mlt_playlist_append_io( this, producer
, in
, out
);
586 // Move to the position specified
587 mlt_playlist_move( this, this->count
- 1, where
);
588 mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
590 return mlt_playlist_virtual_refresh( this );
593 /** Remove an entry in the playlist.
596 int mlt_playlist_remove( mlt_playlist
this, int where
)
598 int error
= where
< 0 || where
>= this->count
;
599 if ( error
== 0 && mlt_playlist_unmix( this, where
) != 0 )
601 // We need to know the current clip and the position within the playlist
602 int current
= mlt_playlist_current_clip( this );
603 mlt_position position
= mlt_producer_position( MLT_PLAYLIST_PRODUCER( this ) );
605 // We need all the details about the clip we're removing
606 mlt_playlist_clip_info where_info
;
607 playlist_entry
*entry
= this->list
[ where
];
608 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( entry
->producer
);
614 mlt_playlist_get_clip_info( this, &where_info
, where
);
616 // Make sure the clip to be removed is valid and correct if necessary
619 if ( where
>= this->count
)
620 where
= this->count
- 1;
622 // Reorganise the list
623 for ( i
= where
+ 1; i
< this->count
; i
++ )
624 this->list
[ i
- 1 ] = this->list
[ i
];
627 if ( entry
->preservation_hack
== 0 )
629 // Decouple from mix_in/out if necessary
630 if ( mlt_properties_get_data( properties
, "mix_in", NULL
) != NULL
)
632 mlt_properties mix
= mlt_properties_get_data( properties
, "mix_in", NULL
);
633 mlt_properties_set_data( mix
, "mix_out", NULL
, 0, NULL
, NULL
);
635 if ( mlt_properties_get_data( properties
, "mix_out", NULL
) != NULL
)
637 mlt_properties mix
= mlt_properties_get_data( properties
, "mix_out", NULL
);
638 mlt_properties_set_data( mix
, "mix_in", NULL
, 0, NULL
, NULL
);
641 if ( mlt_properties_ref_count( MLT_PRODUCER_PROPERTIES( entry
->producer
) ) == 1 )
642 mlt_producer_clear( entry
->producer
);
645 // Close the producer associated to the clip info
646 mlt_event_close( entry
->event
);
647 mlt_producer_close( entry
->producer
);
650 if ( where
== current
)
651 mlt_producer_seek( MLT_PLAYLIST_PRODUCER( this ), where_info
.start
);
652 else if ( where
< current
&& this->count
> 0 )
653 mlt_producer_seek( MLT_PLAYLIST_PRODUCER( this ), position
- where_info
.frame_count
);
654 else if ( this->count
== 0 )
655 mlt_producer_seek( MLT_PLAYLIST_PRODUCER( this ), 0 );
660 // Refresh the playlist
661 mlt_playlist_virtual_refresh( this );
667 /** Move an entry in the playlist.
670 int mlt_playlist_move( mlt_playlist
this, int src
, int dest
)
674 /* We need to ensure that the requested indexes are valid and correct it as necessary */
677 if ( src
>= this->count
)
678 src
= this->count
- 1;
682 if ( dest
>= this->count
)
683 dest
= this->count
- 1;
685 if ( src
!= dest
&& this->count
> 1 )
687 int current
= mlt_playlist_current_clip( this );
688 mlt_position position
= mlt_producer_position( MLT_PLAYLIST_PRODUCER( this ) );
689 playlist_entry
*src_entry
= NULL
;
691 // We need all the details about the current clip
692 mlt_playlist_clip_info current_info
;
694 mlt_playlist_get_clip_info( this, ¤t_info
, current
);
695 position
-= current_info
.start
;
697 if ( current
== src
)
699 else if ( current
> src
&& current
< dest
)
701 else if ( current
== dest
)
704 src_entry
= this->list
[ src
];
707 for ( i
= src
; i
> dest
; i
-- )
708 this->list
[ i
] = this->list
[ i
- 1 ];
712 for ( i
= src
; i
< dest
; i
++ )
713 this->list
[ i
] = this->list
[ i
+ 1 ];
715 this->list
[ dest
] = src_entry
;
717 mlt_playlist_get_clip_info( this, ¤t_info
, current
);
718 mlt_producer_seek( MLT_PLAYLIST_PRODUCER( this ), current_info
.start
+ position
);
719 mlt_playlist_virtual_refresh( this );
725 /** Repeat the specified clip n times.
728 int mlt_playlist_repeat_clip( mlt_playlist
this, int clip
, int repeat
)
730 int error
= repeat
< 1 || clip
< 0 || clip
>= this->count
;
733 playlist_entry
*entry
= this->list
[ clip
];
734 entry
->repeat
= repeat
;
735 mlt_playlist_virtual_refresh( this );
740 /** Resize the specified clip.
743 int mlt_playlist_resize_clip( mlt_playlist
this, int clip
, mlt_position in
, mlt_position out
)
745 int error
= clip
< 0 || clip
>= this->count
;
746 if ( error
== 0 && mlt_playlist_resize_mix( this, clip
, in
, out
) != 0 )
748 playlist_entry
*entry
= this->list
[ clip
];
749 mlt_producer producer
= entry
->producer
;
750 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
752 mlt_events_block( properties
, properties
);
754 if ( mlt_producer_is_blank( producer
) )
756 // Make sure the blank is long enough to accomodate the length specified
757 if ( out
- in
+ 1 > mlt_producer_get_length( &this->blank
) )
759 mlt_properties blank_props
= MLT_PRODUCER_PROPERTIES( &this->blank
);
760 mlt_properties_set_int( blank_props
, "length", out
- in
+ 1 );
761 mlt_properties_set_int( MLT_PRODUCER_PROPERTIES( producer
), "length", out
- in
+ 1 );
762 mlt_producer_set_in_and_out( &this->blank
, 0, out
- in
);
768 if ( out
<= -1 || out
>= mlt_producer_get_length( producer
) )
769 out
= mlt_producer_get_length( producer
) - 1;
778 mlt_producer_set_in_and_out( producer
, in
, out
);
779 mlt_events_unblock( properties
, properties
);
780 mlt_playlist_virtual_refresh( this );
785 /** Split a clip on the playlist at the given position.
788 int mlt_playlist_split( mlt_playlist
this, int clip
, mlt_position position
)
790 int error
= clip
< 0 || clip
>= this->count
;
793 playlist_entry
*entry
= this->list
[ clip
];
794 position
= position
< 0 ? entry
->frame_count
+ position
- 1 : position
;
795 if ( position
>= 0 && position
< entry
->frame_count
- 1 )
797 int in
= entry
->frame_in
;
798 int out
= entry
->frame_out
;
799 mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
800 mlt_playlist_resize_clip( this, clip
, in
, in
+ position
);
801 if ( !mlt_producer_is_blank( entry
->producer
) )
804 mlt_properties entry_properties
= MLT_PRODUCER_PROPERTIES( entry
->producer
);
805 mlt_producer split
= mlt_producer_cut( entry
->producer
, in
+ position
+ 1, out
);
806 mlt_properties split_properties
= MLT_PRODUCER_PROPERTIES( split
);
807 mlt_playlist_insert( this, split
, clip
+ 1, 0, -1 );
808 for ( i
= 0; i
< mlt_properties_count( entry_properties
); i
++ )
810 char *name
= mlt_properties_get_name( entry_properties
, i
);
811 if ( name
!= NULL
&& !strncmp( name
, "meta.", 5 ) )
812 mlt_properties_set( split_properties
, name
, mlt_properties_get_value( entry_properties
, i
) );
814 mlt_producer_close( split
);
818 mlt_playlist_insert( this, &this->blank
, clip
+ 1, 0, out
- position
- 1 );
820 mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
821 mlt_playlist_virtual_refresh( this );
831 /** Split the playlist at the absolute position.
834 int mlt_playlist_split_at( mlt_playlist
this, mlt_position position
, int left
)
836 int result
= this == NULL ?
-1 : 0;
839 if ( position
>= 0 && position
< mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) ) )
841 int clip
= mlt_playlist_get_clip_index_at( this, position
);
842 mlt_playlist_clip_info info
;
843 mlt_playlist_get_clip_info( this, &info
, clip
);
844 if ( left
&& position
!= info
.start
)
845 mlt_playlist_split( this, clip
, position
- info
.start
- 1 );
847 mlt_playlist_split( this, clip
, position
- info
.start
);
850 else if ( position
<= 0 )
856 result
= mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) );
862 /** Join 1 or more consecutive clips.
865 int mlt_playlist_join( mlt_playlist
this, int clip
, int count
, int merge
)
867 int error
= clip
< 0 || clip
>= this->count
;
871 mlt_playlist new_clip
= mlt_playlist_init( );
872 mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
873 if ( clip
+ count
>= this->count
)
874 count
= this->count
- clip
- 1;
875 for ( i
= 0; i
<= count
; i
++ )
877 playlist_entry
*entry
= this->list
[ clip
];
878 mlt_playlist_append( new_clip
, entry
->producer
);
879 mlt_playlist_repeat_clip( new_clip
, i
, entry
->repeat
);
880 entry
->preservation_hack
= 1;
881 mlt_playlist_remove( this, clip
);
883 mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
884 mlt_playlist_insert( this, MLT_PLAYLIST_PRODUCER( new_clip
), clip
, 0, -1 );
885 mlt_playlist_close( new_clip
);
890 /** Mix consecutive clips for a specified length and apply transition if specified.
893 int mlt_playlist_mix( mlt_playlist
this, int clip
, int length
, mlt_transition transition
)
895 int error
= ( clip
< 0 || clip
+ 1 >= this->count
);
898 playlist_entry
*clip_a
= this->list
[ clip
];
899 playlist_entry
*clip_b
= this->list
[ clip
+ 1 ];
900 mlt_producer track_a
= NULL
;
901 mlt_producer track_b
= NULL
;
902 mlt_tractor tractor
= mlt_tractor_new( );
903 mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
905 // Check length is valid for both clips and resize if necessary.
906 int max_size
= clip_a
->frame_count
> clip_b
->frame_count ? clip_a
->frame_count
: clip_b
->frame_count
;
907 length
= length
> max_size ? max_size
: length
;
909 // Create the a and b tracks/cuts if necessary - note that no cuts are required if the length matches
910 if ( length
!= clip_a
->frame_count
)
911 track_a
= mlt_producer_cut( clip_a
->producer
, clip_a
->frame_out
- length
+ 1, clip_a
->frame_out
);
913 track_a
= clip_a
->producer
;
915 if ( length
!= clip_b
->frame_count
)
916 track_b
= mlt_producer_cut( clip_b
->producer
, clip_b
->frame_in
, clip_b
->frame_in
+ length
- 1 );
918 track_b
= clip_b
->producer
;
920 // Set the tracks on the tractor
921 mlt_tractor_set_track( tractor
, track_a
, 0 );
922 mlt_tractor_set_track( tractor
, track_b
, 1 );
924 // Insert the mix object into the playlist
925 mlt_playlist_insert( this, MLT_TRACTOR_PRODUCER( tractor
), clip
+ 1, -1, -1 );
926 mlt_properties_set_data( MLT_TRACTOR_PROPERTIES( tractor
), "mlt_mix", tractor
, 0, NULL
, NULL
);
928 // Attach the transition
929 if ( transition
!= NULL
)
931 mlt_field field
= mlt_tractor_field( tractor
);
932 mlt_field_plant_transition( field
, transition
, 0, 1 );
933 mlt_transition_set_in_and_out( transition
, 0, length
- 1 );
936 // Close our references to the tracks if we created new cuts above (the tracks can still be used here)
937 if ( track_a
!= clip_a
->producer
)
938 mlt_producer_close( track_a
);
939 if ( track_b
!= clip_b
->producer
)
940 mlt_producer_close( track_b
);
942 // Check if we have anything left on the right hand clip
943 if ( track_b
== clip_b
->producer
)
945 clip_b
->preservation_hack
= 1;
946 mlt_playlist_remove( this, clip
+ 2 );
948 else if ( clip_b
->frame_out
- clip_b
->frame_in
> length
)
950 mlt_playlist_resize_clip( this, clip
+ 2, clip_b
->frame_in
+ length
, clip_b
->frame_out
);
951 mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( clip_b
->producer
), "mix_in", tractor
, 0, NULL
, NULL
);
952 mlt_properties_set_data( MLT_TRACTOR_PROPERTIES( tractor
), "mix_out", clip_b
->producer
, 0, NULL
, NULL
);
956 mlt_producer_clear( clip_b
->producer
);
957 mlt_playlist_remove( this, clip
+ 2 );
960 // Check if we have anything left on the left hand clip
961 if ( track_a
== clip_a
->producer
)
963 clip_a
->preservation_hack
= 1;
964 mlt_playlist_remove( this, clip
);
966 else if ( clip_a
->frame_out
- clip_a
->frame_in
> length
)
968 mlt_playlist_resize_clip( this, clip
, clip_a
->frame_in
, clip_a
->frame_out
- length
);
969 mlt_properties_set_data( MLT_PRODUCER_PROPERTIES( clip_a
->producer
), "mix_out", tractor
, 0, NULL
, NULL
);
970 mlt_properties_set_data( MLT_TRACTOR_PROPERTIES( tractor
), "mix_in", clip_a
->producer
, 0, NULL
, NULL
);
974 mlt_producer_clear( clip_a
->producer
);
975 mlt_playlist_remove( this, clip
);
978 // Unblock and force a fire off of change events to listeners
979 mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
980 mlt_playlist_virtual_refresh( this );
981 mlt_tractor_close( tractor
);
986 /** Add a transition to an existing mix.
989 int mlt_playlist_mix_add( mlt_playlist
this, int clip
, mlt_transition transition
)
991 mlt_producer producer
= mlt_producer_cut_parent( mlt_playlist_get_clip( this, clip
) );
992 mlt_properties properties
= producer
!= NULL ?
MLT_PRODUCER_PROPERTIES( producer
) : NULL
;
993 mlt_tractor tractor
= properties
!= NULL ?
mlt_properties_get_data( properties
, "mlt_mix", NULL
) : NULL
;
994 int error
= transition
== NULL
|| tractor
== NULL
;
997 mlt_field field
= mlt_tractor_field( tractor
);
998 mlt_field_plant_transition( field
, transition
, 0, 1 );
999 mlt_transition_set_in_and_out( transition
, 0, this->list
[ clip
]->frame_count
- 1 );
1004 /** Return the clip at the clip index.
1007 mlt_producer
mlt_playlist_get_clip( mlt_playlist
this, int clip
)
1009 if ( clip
>= 0 && clip
< this->count
)
1010 return this->list
[ clip
]->producer
;
1014 /** Return the clip at the specified position.
1017 mlt_producer
mlt_playlist_get_clip_at( mlt_playlist
this, mlt_position position
)
1019 int index
= 0, total
= 0;
1020 return mlt_playlist_locate( this, &position
, &index
, &total
);
1023 /** Return the clip index of the specified position.
1026 int mlt_playlist_get_clip_index_at( mlt_playlist
this, mlt_position position
)
1028 int index
= 0, total
= 0;
1029 mlt_playlist_locate( this, &position
, &index
, &total
);
1033 /** Determine if the clip is a mix.
1036 int mlt_playlist_clip_is_mix( mlt_playlist
this, int clip
)
1038 mlt_producer producer
= mlt_producer_cut_parent( mlt_playlist_get_clip( this, clip
) );
1039 mlt_properties properties
= producer
!= NULL ?
MLT_PRODUCER_PROPERTIES( producer
) : NULL
;
1040 mlt_tractor tractor
= properties
!= NULL ?
mlt_properties_get_data( properties
, "mlt_mix", NULL
) : NULL
;
1041 return tractor
!= NULL
;
1044 /** Remove a mixed clip - ensure that the cuts included in the mix find their way
1045 back correctly on to the playlist.
1048 static int mlt_playlist_unmix( mlt_playlist
this, int clip
)
1050 int error
= ( clip
< 0 || clip
>= this->count
);
1052 // Ensure that the clip request is actually a mix
1055 mlt_producer producer
= mlt_producer_cut_parent( this->list
[ clip
]->producer
);
1056 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
1057 error
= mlt_properties_get_data( properties
, "mlt_mix", NULL
) == NULL
||
1058 this->list
[ clip
]->preservation_hack
;
1063 playlist_entry
*mix
= this->list
[ clip
];
1064 mlt_tractor tractor
= ( mlt_tractor
)mlt_producer_cut_parent( mix
->producer
);
1065 mlt_properties properties
= MLT_TRACTOR_PROPERTIES( tractor
);
1066 mlt_producer clip_a
= mlt_properties_get_data( properties
, "mix_in", NULL
);
1067 mlt_producer clip_b
= mlt_properties_get_data( properties
, "mix_out", NULL
);
1068 int length
= mlt_producer_get_playtime( MLT_TRACTOR_PRODUCER( tractor
) );
1069 mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
1071 if ( clip_a
!= NULL
)
1073 mlt_producer_set_in_and_out( clip_a
, mlt_producer_get_in( clip_a
), mlt_producer_get_out( clip_a
) + length
);
1077 mlt_producer cut
= mlt_tractor_get_track( tractor
, 0 );
1078 mlt_playlist_insert( this, cut
, clip
, -1, -1 );
1082 if ( clip_b
!= NULL
)
1084 mlt_producer_set_in_and_out( clip_b
, mlt_producer_get_in( clip_b
) - length
, mlt_producer_get_out( clip_b
) );
1088 mlt_producer cut
= mlt_tractor_get_track( tractor
, 1 );
1089 mlt_playlist_insert( this, cut
, clip
+ 1, -1, -1 );
1092 mlt_properties_set_data( properties
, "mlt_mix", NULL
, 0, NULL
, NULL
);
1093 mlt_playlist_remove( this, clip
);
1094 mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
1095 mlt_playlist_virtual_refresh( this );
1100 static int mlt_playlist_resize_mix( mlt_playlist
this, int clip
, int in
, int out
)
1102 int error
= ( clip
< 0 || clip
>= this->count
);
1104 // Ensure that the clip request is actually a mix
1107 mlt_producer producer
= mlt_producer_cut_parent( this->list
[ clip
]->producer
);
1108 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
1109 error
= mlt_properties_get_data( properties
, "mlt_mix", NULL
) == NULL
;
1114 playlist_entry
*mix
= this->list
[ clip
];
1115 mlt_tractor tractor
= ( mlt_tractor
)mlt_producer_cut_parent( mix
->producer
);
1116 mlt_properties properties
= MLT_TRACTOR_PROPERTIES( tractor
);
1117 mlt_producer clip_a
= mlt_properties_get_data( properties
, "mix_in", NULL
);
1118 mlt_producer clip_b
= mlt_properties_get_data( properties
, "mix_out", NULL
);
1119 mlt_producer track_a
= mlt_tractor_get_track( tractor
, 0 );
1120 mlt_producer track_b
= mlt_tractor_get_track( tractor
, 1 );
1121 int length
= out
- in
+ 1;
1122 int length_diff
= length
- mlt_producer_get_playtime( MLT_TRACTOR_PRODUCER( tractor
) );
1123 mlt_events_block( MLT_PLAYLIST_PROPERTIES( this ), this );
1125 if ( clip_a
!= NULL
)
1126 mlt_producer_set_in_and_out( clip_a
, mlt_producer_get_in( clip_a
), mlt_producer_get_out( clip_a
) - length_diff
);
1128 if ( clip_b
!= NULL
)
1129 mlt_producer_set_in_and_out( clip_b
, mlt_producer_get_in( clip_b
) + length_diff
, mlt_producer_get_out( clip_b
) );
1131 mlt_producer_set_in_and_out( track_a
, mlt_producer_get_in( track_a
) - length_diff
, mlt_producer_get_out( track_a
) );
1132 mlt_producer_set_in_and_out( track_b
, mlt_producer_get_in( track_b
), mlt_producer_get_out( track_b
) + length_diff
);
1133 mlt_producer_set_in_and_out( MLT_MULTITRACK_PRODUCER( mlt_tractor_multitrack( tractor
) ), in
, out
);
1134 mlt_producer_set_in_and_out( MLT_TRACTOR_PRODUCER( tractor
), in
, out
);
1135 mlt_properties_set_position( MLT_PRODUCER_PROPERTIES( mix
->producer
), "length", out
- in
+ 1 );
1136 mlt_producer_set_in_and_out( mix
->producer
, in
, out
);
1138 mlt_events_unblock( MLT_PLAYLIST_PROPERTIES( this ), this );
1139 mlt_playlist_virtual_refresh( this );
1144 /** Consolodate adjacent blank producers.
1147 void mlt_playlist_consolidate_blanks( mlt_playlist
this, int keep_length
)
1152 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
1154 mlt_events_block( properties
, properties
);
1155 for ( i
= 1; i
< this->count
; i
++ )
1157 playlist_entry
*left
= this->list
[ i
- 1 ];
1158 playlist_entry
*right
= this->list
[ i
];
1160 if ( mlt_producer_is_blank( left
->producer
) && mlt_producer_is_blank( right
->producer
) )
1162 mlt_playlist_resize_clip( this, i
- 1, 0, left
->frame_count
+ right
->frame_count
- 1 );
1163 mlt_playlist_remove( this, i
-- );
1167 if ( !keep_length
&& this->count
> 0 )
1169 playlist_entry
*last
= this->list
[ this->count
- 1 ];
1170 if ( mlt_producer_is_blank( last
->producer
) )
1171 mlt_playlist_remove( this, this->count
- 1 );
1174 mlt_events_unblock( properties
, properties
);
1175 mlt_playlist_virtual_refresh( this );
1179 /** Determine if the specified clip index is a blank.
1182 int mlt_playlist_is_blank( mlt_playlist
this, int clip
)
1184 return this == NULL
|| mlt_producer_is_blank( mlt_playlist_get_clip( this, clip
) );
1187 /** Determine if the specified position is a blank.
1190 int mlt_playlist_is_blank_at( mlt_playlist
this, mlt_position position
)
1192 return this == NULL
|| mlt_producer_is_blank( mlt_playlist_get_clip_at( this, position
) );
1195 /** Replace the specified clip with a blank and return the clip.
1198 mlt_producer
mlt_playlist_replace_with_blank( mlt_playlist
this, int clip
)
1200 mlt_producer producer
= NULL
;
1201 if ( !mlt_playlist_is_blank( this, clip
) )
1203 playlist_entry
*entry
= this->list
[ clip
];
1204 int in
= entry
->frame_in
;
1205 int out
= entry
->frame_out
;
1206 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
1207 producer
= entry
->producer
;
1208 mlt_properties_inc_ref( MLT_PRODUCER_PROPERTIES( producer
) );
1209 mlt_events_block( properties
, properties
);
1210 mlt_playlist_remove( this, clip
);
1211 mlt_playlist_blank( this, out
- in
);
1212 mlt_playlist_move( this, this->count
- 1, clip
);
1213 mlt_events_unblock( properties
, properties
);
1214 mlt_playlist_virtual_refresh( this );
1215 mlt_producer_set_in_and_out( producer
, in
, out
);
1220 void mlt_playlist_insert_blank( mlt_playlist
this, int clip
, int length
)
1222 if ( this != NULL
&& length
>= 0 )
1224 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
1225 mlt_events_block( properties
, properties
);
1226 mlt_playlist_blank( this, length
);
1227 mlt_playlist_move( this, this->count
- 1, clip
);
1228 mlt_events_unblock( properties
, properties
);
1229 mlt_playlist_virtual_refresh( this );
1233 void mlt_playlist_pad_blanks( mlt_playlist
this, mlt_position position
, int length
, int find
)
1235 if ( this != NULL
&& length
!= 0 )
1237 int clip
= mlt_playlist_get_clip_index_at( this, position
);
1238 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
1239 mlt_events_block( properties
, properties
);
1240 if ( find
&& clip
< this->count
&& !mlt_playlist_is_blank( this, clip
) )
1242 if ( clip
< this->count
&& mlt_playlist_is_blank( this, clip
) )
1244 mlt_playlist_clip_info info
;
1245 mlt_playlist_get_clip_info( this, &info
, clip
);
1246 if ( info
.frame_out
+ length
> info
.frame_in
)
1247 mlt_playlist_resize_clip( this, clip
, info
.frame_in
, info
.frame_out
+ length
);
1249 mlt_playlist_remove( this, clip
);
1251 else if ( find
&& clip
< this->count
&& length
> 0 )
1253 mlt_playlist_insert_blank( this, clip
, length
);
1255 mlt_events_unblock( properties
, properties
);
1256 mlt_playlist_virtual_refresh( this );
1260 int mlt_playlist_insert_at( mlt_playlist
this, mlt_position position
, mlt_producer producer
, int mode
)
1262 int ret
= this == NULL
|| position
< 0 || producer
== NULL
;
1265 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
1266 int length
= mlt_producer_get_playtime( producer
);
1267 int clip
= mlt_playlist_get_clip_index_at( this, position
);
1268 mlt_playlist_clip_info info
;
1269 mlt_playlist_get_clip_info( this, &info
, clip
);
1270 mlt_events_block( properties
, this );
1271 if ( clip
< this->count
&& mlt_playlist_is_blank( this, clip
) )
1273 // Split and move to new clip if need be
1274 if ( position
!= info
.start
&& mlt_playlist_split( this, clip
, position
- info
.start
- 1 ) == 0 )
1275 mlt_playlist_get_clip_info( this, &info
, ++ clip
);
1277 // Split again if need be
1278 if ( length
< info
.frame_count
)
1279 mlt_playlist_split( this, clip
, length
- 1 );
1282 mlt_playlist_remove( this, clip
);
1285 mlt_playlist_insert( this, producer
, clip
, -1, -1 );
1288 else if ( clip
< this->count
)
1290 if ( position
> info
.start
+ info
.frame_count
/ 2 )
1292 if ( mode
== 1 && clip
< this->count
&& mlt_playlist_is_blank( this, clip
) )
1294 mlt_playlist_get_clip_info( this, &info
, clip
);
1295 if ( length
< info
.frame_count
)
1296 mlt_playlist_split( this, clip
, length
);
1297 mlt_playlist_remove( this, clip
);
1299 mlt_playlist_insert( this, producer
, clip
, -1, -1 );
1305 if ( position
== info
.start
)
1306 mlt_playlist_remove( this, clip
);
1308 mlt_playlist_blank( this, position
- mlt_properties_get_int( properties
, "length" ) - 1 );
1310 mlt_playlist_append( this, producer
);
1311 ret
= this->count
- 1;
1313 mlt_events_unblock( properties
, this );
1314 mlt_playlist_virtual_refresh( this );
1323 int mlt_playlist_clip_start( mlt_playlist
this, int clip
)
1325 mlt_playlist_clip_info info
;
1326 if ( mlt_playlist_get_clip_info( this, &info
, clip
) == 0 )
1328 return clip
< 0 ?
0 : mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) );
1331 int mlt_playlist_clip_length( mlt_playlist
this, int clip
)
1333 mlt_playlist_clip_info info
;
1334 if ( mlt_playlist_get_clip_info( this, &info
, clip
) == 0 )
1335 return info
.frame_count
;
1339 int mlt_playlist_blanks_from( mlt_playlist
this, int clip
, int bounded
)
1342 mlt_playlist_clip_info info
;
1343 if ( this != NULL
&& clip
< this->count
)
1345 mlt_playlist_get_clip_info( this, &info
, clip
);
1346 if ( mlt_playlist_is_blank( this, clip
) )
1347 count
+= info
.frame_count
;
1349 bounded
= this->count
;
1350 for ( clip
++; clip
< this->count
&& bounded
>= 0; clip
++ )
1352 mlt_playlist_get_clip_info( this, &info
, clip
);
1353 if ( mlt_playlist_is_blank( this, clip
) )
1354 count
+= info
.frame_count
;
1362 int mlt_playlist_remove_region( mlt_playlist
this, mlt_position position
, int length
)
1364 int index
= mlt_playlist_get_clip_index_at( this, position
);
1365 if ( index
>= 0 && index
< this->count
)
1367 mlt_properties properties
= MLT_PLAYLIST_PROPERTIES( this );
1368 int clip_start
= mlt_playlist_clip_start( this, index
);
1369 int clip_length
= mlt_playlist_clip_length( this, index
);
1370 int list_length
= mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( this ) );
1371 mlt_events_block( properties
, this );
1373 if ( position
+ length
> list_length
)
1374 length
-= ( position
+ length
- list_length
);
1376 if ( clip_start
< position
)
1378 mlt_playlist_split( this, index
++, position
- clip_start
);
1379 clip_length
-= position
- clip_start
;
1384 if ( mlt_playlist_clip_length( this, index
) > length
)
1385 mlt_playlist_split( this, index
, length
);
1386 length
-= mlt_playlist_clip_length( this, index
);
1387 mlt_playlist_remove( this, index
);
1390 mlt_playlist_consolidate_blanks( this, 0 );
1391 mlt_events_unblock( properties
, this );
1392 mlt_playlist_virtual_refresh( this );
1394 // Just to be sure, we'll get the clip index again...
1395 index
= mlt_playlist_get_clip_index_at( this, position
);
1400 int mlt_playlist_move_region( mlt_playlist
this, mlt_position position
, int length
, int new_position
)
1408 /** Get the current frame.
1411 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
1413 // Check that we have a producer
1414 if ( producer
== NULL
)
1416 *frame
= mlt_frame_init( );
1420 // Get this mlt_playlist
1421 mlt_playlist
this = producer
->child
;
1423 // Need to ensure the frame is deinterlaced when repeating 1 frame
1424 int progressive
= 0;
1426 // Get the real producer
1427 mlt_service real
= mlt_playlist_virtual_seek( this, &progressive
);
1429 // Check that we have a producer
1432 *frame
= mlt_frame_init( );
1437 if ( !mlt_properties_get_int( MLT_SERVICE_PROPERTIES( real
), "meta.fx_cut" ) )
1439 mlt_service_get_frame( real
, frame
, index
);
1443 mlt_producer parent
= mlt_producer_cut_parent( ( mlt_producer
)real
);
1444 *frame
= mlt_frame_init( );
1445 mlt_properties_set_int( MLT_FRAME_PROPERTIES( *frame
), "fx_cut", 1 );
1446 mlt_frame_push_service( *frame
, NULL
);
1447 mlt_frame_push_audio( *frame
, NULL
);
1448 mlt_service_apply_filters( MLT_PRODUCER_SERVICE( parent
), *frame
, 0 );
1449 mlt_service_apply_filters( real
, *frame
, 0 );
1450 mlt_deque_pop_front( MLT_FRAME_IMAGE_STACK( *frame
) );
1451 mlt_deque_pop_front( MLT_FRAME_AUDIO_STACK( *frame
) );
1454 // Check if we're at the end of the clip
1455 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
1456 if ( mlt_properties_get_int( properties
, "end_of_clip" ) )
1457 mlt_playlist_virtual_set_out( this );
1459 // Set the consumer progressive property
1462 mlt_properties_set_int( properties
, "consumer_deinterlace", progressive
);
1463 mlt_properties_set_int( properties
, "test_audio", 1 );
1466 // Check for notifier and call with appropriate argument
1467 mlt_properties playlist_properties
= MLT_PRODUCER_PROPERTIES( producer
);
1468 void ( *notifier
)( void * ) = mlt_properties_get_data( playlist_properties
, "notifier", NULL
);
1469 if ( notifier
!= NULL
)
1471 void *argument
= mlt_properties_get_data( playlist_properties
, "notifier_arg", NULL
);
1472 notifier( argument
);
1475 // Update position on the frame we're creating
1476 mlt_frame_set_position( *frame
, mlt_producer_frame( producer
) );
1478 // Position ourselves on the next frame
1479 mlt_producer_prepare_next( producer
);
1484 /** Close the playlist.
1487 void mlt_playlist_close( mlt_playlist
this )
1489 if ( this != NULL
&& mlt_properties_dec_ref( MLT_PLAYLIST_PROPERTIES( this ) ) <= 0 )
1492 this->parent
.close
= NULL
;
1493 for ( i
= 0; i
< this->count
; i
++ )
1495 mlt_event_close( this->list
[ i
]->event
);
1496 mlt_producer_close( this->list
[ i
]->producer
);
1497 free( this->list
[ i
] );
1499 mlt_producer_close( &this->blank
);
1500 mlt_producer_close( &this->parent
);