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 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.
23 #include "mlt_playlist.h"
24 #include "mlt_tractor.h"
25 #include "mlt_field.h"
26 #include "mlt_frame.h"
27 #include "mlt_transition.h"
33 /** Virtual playlist entry.
36 typedef struct playlist_entry_s
38 mlt_producer producer;
39 mlt_position frame_in;
40 mlt_position frame_out;
41 mlt_position frame_count;
42 mlt_position producer_length;
46 struct playlist_entry_s *mix_in;
47 struct playlist_entry_s *mix_out;
51 /** Private definition.
56 struct mlt_producer_s parent;
57 struct mlt_producer_s blank;
61 playlist_entry **list;
64 /** Forward declarations
67 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
68 static int mlt_playlist_unmix( mlt_playlist this, int clip );
69 static int mlt_playlist_resize_mix( mlt_playlist this, int clip, int in, int out );
74 mlt_playlist mlt_playlist_init( )
76 mlt_playlist this = calloc( sizeof( struct mlt_playlist_s ), 1 );
79 mlt_producer producer = &this->parent;
81 // Construct the producer
82 mlt_producer_init( producer, this );
84 // Override the producer get_frame
85 producer->get_frame = producer_get_frame;
87 // Define the destructor
88 producer->close = ( mlt_destructor )mlt_playlist_close;
89 producer->close_object = this;
92 mlt_producer_init( &this->blank, NULL );
93 mlt_properties_set( mlt_producer_properties( &this->blank ), "mlt_service", "blank" );
94 mlt_properties_set( mlt_producer_properties( &this->blank ), "resource", "blank" );
96 // Indicate that this producer is a playlist
97 mlt_properties_set_data( mlt_playlist_properties( this ), "playlist", this, 0, NULL, NULL );
99 // Specify the eof condition
100 mlt_properties_set( mlt_playlist_properties( this ), "eof", "pause" );
101 mlt_properties_set( mlt_playlist_properties( this ), "resource", "<playlist>" );
102 mlt_properties_set( mlt_playlist_properties( this ), "mlt_type", "mlt_producer" );
103 mlt_properties_set_position( mlt_playlist_properties( this ), "in", 0 );
104 mlt_properties_set_position( mlt_playlist_properties( this ), "out", 0 );
105 mlt_properties_set_position( mlt_playlist_properties( this ), "length", 0 );
108 this->list = malloc( this->size * sizeof( playlist_entry * ) );
114 /** Get the producer associated to this playlist.
117 mlt_producer mlt_playlist_producer( mlt_playlist this )
119 return this != NULL ? &this->parent : NULL;
122 /** Get the service associated to this playlist.
125 mlt_service mlt_playlist_service( mlt_playlist this )
127 return mlt_producer_service( &this->parent );
130 /** Get the propertues associated to this playlist.
133 mlt_properties mlt_playlist_properties( mlt_playlist this )
135 return mlt_producer_properties( &this->parent );
138 /** Refresh the playlist after a clip has been changed.
141 static int mlt_playlist_virtual_refresh( mlt_playlist this )
143 // Obtain the properties
144 mlt_properties properties = mlt_playlist_properties( this );
146 // Get the fps of the first producer
147 double fps = mlt_properties_get_double( properties, "first_fps" );
149 mlt_position frame_count = 0;
151 for ( i = 0; i < this->count; i ++ )
154 mlt_producer producer = this->list[ i ]->producer;
155 int current_length = mlt_producer_get_out( producer ) - mlt_producer_get_in( producer ) + 1;
160 // Inherit it from the producer
161 fps = mlt_producer_get_fps( producer );
163 else if ( fps != mlt_properties_get_double( mlt_producer_properties( producer ), "fps" ) )
165 // Generate a warning for now - the following attempt to fix may fail
166 fprintf( stderr, "Warning: fps mismatch on playlist producer %d\n", this->count );
168 // It should be safe to impose fps on an image producer, but not necessarily safe for video
169 mlt_properties_set_double( mlt_producer_properties( producer ), "fps", fps );
172 // Check if the length of the producer has changed
173 if ( this->list[ i ]->producer != &this->blank &&
174 ( this->list[ i ]->frame_in != mlt_producer_get_in( producer ) ||
175 this->list[ i ]->frame_out != mlt_producer_get_out( producer ) ) )
177 // This clip should be removed...
178 if ( current_length == 1 )
180 this->list[ i ]->frame_in = 0;
181 this->list[ i ]->frame_out = 0;
182 this->list[ i ]->frame_count = 0;
186 this->list[ i ]->frame_in = mlt_producer_get_in( producer );
187 this->list[ i ]->frame_out = mlt_producer_get_out( producer );
188 this->list[ i ]->frame_count = current_length;
191 // Update the producer_length
192 this->list[ i ]->producer_length = current_length;
195 // Update the frame_count for this clip
196 frame_count += this->list[ i ]->frame_count;
199 // Refresh all properties
200 mlt_properties_set_double( properties, "first_fps", fps );
201 mlt_properties_set_double( properties, "fps", fps == 0 ? 25 : fps );
202 mlt_events_block( properties, properties );
203 mlt_properties_set_position( properties, "length", frame_count );
204 mlt_events_unblock( properties, properties );
205 mlt_properties_set_position( properties, "out", frame_count - 1 );
210 /** Listener for producers on the playlist.
213 static void mlt_playlist_listener( mlt_producer producer, mlt_playlist this )
215 mlt_playlist_virtual_refresh( this );
218 /** Append to the virtual playlist.
221 static int mlt_playlist_virtual_append( mlt_playlist this, mlt_producer source, mlt_position in, mlt_position out )
223 mlt_producer producer = NULL;
224 mlt_properties properties = NULL;
226 // If we have a cut, then use the in/out points from the cut
227 if ( &this->blank == source )
230 properties = mlt_producer_properties( producer );
231 mlt_properties_inc_ref( properties );
233 else if ( mlt_producer_is_cut( source ) )
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 );
241 mlt_properties_inc_ref( properties );
245 producer = mlt_producer_cut( source, in, out );
246 if ( in == -1 || in < mlt_producer_get_in( producer ) )
247 in = mlt_producer_get_in( producer );
248 if ( out == -1 || out > mlt_producer_get_out( producer ) )
249 out = mlt_producer_get_out( producer );
250 properties = mlt_producer_properties( producer );
254 // Check that we have room
255 if ( this->count >= this->size )
258 this->list = realloc( this->list, ( this->size + 10 ) * sizeof( playlist_entry * ) );
259 for ( i = this->size; i < this->size + 10; i ++ ) this->list[ i ] = NULL;
263 this->list[ this->count ] = calloc( sizeof( playlist_entry ), 1 );
264 this->list[ this->count ]->producer = producer;
265 this->list[ this->count ]->frame_in = in;
266 this->list[ this->count ]->frame_out = out;
267 this->list[ this->count ]->frame_count = out - in + 1;
268 this->list[ this->count ]->producer_length = mlt_producer_get_out( producer ) - mlt_producer_get_in( producer ) + 1;
269 this->list[ this->count ]->event = mlt_events_listen( properties, this, "producer-changed", ( mlt_listener )mlt_playlist_listener );
270 mlt_event_inc_ref( this->list[ this->count ]->event );
272 mlt_properties_set( mlt_producer_properties( source ), "eof", "pause" );
273 mlt_properties_set( properties, "eof", "pause" );
275 mlt_producer_set_speed( source, 0 );
276 mlt_producer_set_speed( producer, 0 );
280 return mlt_playlist_virtual_refresh( this );
283 /** Seek in the virtual playlist.
286 static mlt_service mlt_playlist_virtual_seek( mlt_playlist this )
288 // Default producer to blank
289 mlt_producer producer = NULL;
291 // Map playlist position to real producer in virtual playlist
292 mlt_position position = mlt_producer_frame( &this->parent );
294 mlt_position original = position;
296 // Total number of frames
299 // Get the properties
300 mlt_properties properties = mlt_playlist_properties( this );
302 // Get the eof handling
303 char *eof = mlt_properties_get( properties, "eof" );
305 // Index for the main loop
308 // Loop for each producer until found
309 for ( i = 0; i < this->count; i ++ )
311 // Increment the total
312 total += this->list[ i ]->frame_count;
314 // Check if the position indicates that we have found the clip
315 if ( position < this->list[ i ]->frame_count )
317 // Found it, now break
318 producer = this->list[ i ]->producer;
323 // Decrement position by length of this entry
324 position -= this->list[ i ]->frame_count;
328 // Seek in real producer to relative position
329 if ( producer != NULL )
331 mlt_producer_seek( producer, position );
333 else if ( !strcmp( eof, "pause" ) && total > 0 )
335 playlist_entry *entry = this->list[ this->count - 1 ];
336 mlt_producer this_producer = mlt_playlist_producer( this );
337 mlt_producer_seek( this_producer, original - 1 );
338 producer = entry->producer;
339 mlt_producer_seek( producer, entry->frame_out );
340 mlt_producer_set_speed( this_producer, 0 );
341 mlt_producer_set_speed( producer, 0 );
343 else if ( !strcmp( eof, "loop" ) && total > 0 )
345 playlist_entry *entry = this->list[ 0 ];
346 mlt_producer this_producer = mlt_playlist_producer( this );
347 mlt_producer_seek( this_producer, 0 );
348 producer = entry->producer;
349 mlt_producer_seek( producer, 0 );
353 producer = &this->blank;
356 return mlt_producer_service( producer );
359 /** Invoked when a producer indicates that it has prematurely reached its end.
362 static mlt_producer mlt_playlist_virtual_set_out( mlt_playlist this )
364 // Default producer to blank
365 mlt_producer producer = &this->blank;
367 // Map playlist position to real producer in virtual playlist
368 mlt_position position = mlt_producer_frame( &this->parent );
370 // Loop through the virtual playlist
373 for ( i = 0; i < this->count; i ++ )
375 if ( position < this->list[ i ]->frame_count )
377 // Found it, now break
378 producer = this->list[ i ]->producer;
383 // Decrement position by length of this entry
384 position -= this->list[ i ]->frame_count;
388 // Seek in real producer to relative position
389 if ( i < this->count && this->list[ i ]->frame_out != position )
391 // Update the frame_count for the changed clip (hmmm)
392 this->list[ i ]->frame_out = position;
393 this->list[ i ]->frame_count = this->list[ i ]->frame_out - this->list[ i ]->frame_in + 1;
395 // Refresh the playlist
396 mlt_playlist_virtual_refresh( this );
402 /** Obtain the current clips index.
405 int mlt_playlist_current_clip( mlt_playlist this )
407 // Map playlist position to real producer in virtual playlist
408 mlt_position position = mlt_producer_frame( &this->parent );
410 // Loop through the virtual playlist
413 for ( i = 0; i < this->count; i ++ )
415 if ( position < this->list[ i ]->frame_count )
417 // Found it, now break
422 // Decrement position by length of this entry
423 position -= this->list[ i ]->frame_count;
430 /** Obtain the current clips producer.
433 mlt_producer mlt_playlist_current( mlt_playlist this )
435 int i = mlt_playlist_current_clip( this );
436 if ( i < this->count )
437 return this->list[ i ]->producer;
442 /** Get the position which corresponds to the start of the next clip.
445 mlt_position mlt_playlist_clip( mlt_playlist this, mlt_whence whence, int index )
447 mlt_position position = 0;
448 int absolute_clip = index;
451 // Determine the absolute clip
454 case mlt_whence_relative_start:
455 absolute_clip = index;
458 case mlt_whence_relative_current:
459 absolute_clip = mlt_playlist_current_clip( this ) + index;
462 case mlt_whence_relative_end:
463 absolute_clip = this->count - index;
467 // Check that we're in a valid range
468 if ( absolute_clip < 0 )
470 else if ( absolute_clip > this->count )
471 absolute_clip = this->count;
473 // Now determine the position
474 for ( i = 0; i < absolute_clip; i ++ )
475 position += this->list[ i ]->frame_count;
480 /** Get all the info about the clip specified.
483 int mlt_playlist_get_clip_info( mlt_playlist this, mlt_playlist_clip_info *info, int index )
485 int error = index < 0 || index >= this->count;
486 memset( info, 0, sizeof( mlt_playlist_clip_info ) );
489 mlt_producer producer = mlt_producer_cut_parent( this->list[ index ]->producer );
490 mlt_properties properties = mlt_producer_properties( producer );
492 info->producer = producer;
493 info->cut = this->list[ index ]->producer;
494 info->start = mlt_playlist_clip( this, mlt_whence_relative_start, index );
495 info->resource = mlt_properties_get( properties, "resource" );
496 info->frame_in = this->list[ index ]->frame_in;
497 info->frame_out = this->list[ index ]->frame_out;
498 info->frame_count = this->list[ index ]->frame_count;
499 info->length = mlt_producer_get_length( producer );
500 info->fps = mlt_producer_get_fps( producer );
501 info->event = this->list[ index ]->event;
507 /** Get number of clips in the playlist.
510 int mlt_playlist_count( mlt_playlist this )
515 /** Clear the playlist.
518 int mlt_playlist_clear( mlt_playlist this )
521 for ( i = 0; i < this->count; i ++ )
523 mlt_event_close( this->list[ i ]->event );
524 mlt_producer_close( this->list[ i ]->producer );
527 mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", 0 );
528 return mlt_playlist_virtual_refresh( this );
531 /** Append a producer to the playlist.
534 int mlt_playlist_append( mlt_playlist this, mlt_producer producer )
536 // Append to virtual list
537 return mlt_playlist_virtual_append( this, producer, 0, mlt_producer_get_playtime( producer ) - 1 );
540 /** Append a producer to the playlist with in/out points.
543 int mlt_playlist_append_io( mlt_playlist this, mlt_producer producer, mlt_position in, mlt_position out )
545 // Append to virtual list
546 if ( in != -1 && out != -1 )
547 return mlt_playlist_virtual_append( this, producer, in, out );
549 return mlt_playlist_append( this, producer );
552 /** Append a blank to the playlist of a given length.
555 int mlt_playlist_blank( mlt_playlist this, mlt_position length )
557 // Append to the virtual list
558 return mlt_playlist_virtual_append( this, &this->blank, 0, length );
561 /** Insert a producer into the playlist.
564 int mlt_playlist_insert( mlt_playlist this, mlt_producer producer, int where, mlt_position in, mlt_position out )
567 mlt_events_block( mlt_playlist_properties( this ), this );
568 mlt_playlist_append_io( this, producer, in, out );
570 // Move to the position specified
571 mlt_playlist_move( this, this->count - 1, where );
572 mlt_events_unblock( mlt_playlist_properties( this ), this );
574 return mlt_playlist_virtual_refresh( this );
577 /** Remove an entry in the playlist.
580 int mlt_playlist_remove( mlt_playlist this, int where )
582 int error = where < 0 || where >= this->count;
583 if ( error == 0 && mlt_playlist_unmix( this, where ) != 0 )
585 // We need to know the current clip and the position within the playlist
586 int current = mlt_playlist_current_clip( this );
587 mlt_position position = mlt_producer_position( mlt_playlist_producer( this ) );
589 // We need all the details about the clip we're removing
590 mlt_playlist_clip_info where_info;
591 playlist_entry *entry = this->list[ where ];
597 mlt_playlist_get_clip_info( this, &where_info, where );
599 // Make sure the clip to be removed is valid and correct if necessary
602 if ( where >= this->count )
603 where = this->count - 1;
605 // Close the producer associated to the clip info
606 mlt_event_close( entry->event );
607 mlt_producer_close( entry->producer );
608 if ( entry->mix_in != NULL )
609 entry->mix_in->mix_out = NULL;
610 if ( entry->mix_out != NULL )
611 entry->mix_out->mix_in = NULL;
613 // Reorganise the list
614 for ( i = where + 1; i < this->count; i ++ )
615 this->list[ i - 1 ] = this->list[ i ];
619 if ( where == current )
620 mlt_producer_seek( mlt_playlist_producer( this ), where_info.start );
621 else if ( where < current && this->count > 0 )
622 mlt_producer_seek( mlt_playlist_producer( this ), position - where_info.frame_count );
623 else if ( this->count == 0 )
624 mlt_producer_seek( mlt_playlist_producer( this ), 0 );
629 // Refresh the playlist
630 mlt_playlist_virtual_refresh( this );
636 /** Move an entry in the playlist.
639 int mlt_playlist_move( mlt_playlist this, int src, int dest )
643 /* We need to ensure that the requested indexes are valid and correct it as necessary */
646 if ( src >= this->count )
647 src = this->count - 1;
651 if ( dest >= this->count )
652 dest = this->count - 1;
654 if ( src != dest && this->count > 1 )
656 int current = mlt_playlist_current_clip( this );
657 mlt_position position = mlt_producer_position( mlt_playlist_producer( this ) );
658 playlist_entry *src_entry = NULL;
660 // We need all the details about the current clip
661 mlt_playlist_clip_info current_info;
663 mlt_playlist_get_clip_info( this, ¤t_info, current );
664 position -= current_info.start;
666 if ( current == src )
668 else if ( current > src && current < dest )
670 else if ( current == dest )
673 src_entry = this->list[ src ];
676 for ( i = src; i > dest; i -- )
677 this->list[ i ] = this->list[ i - 1 ];
681 for ( i = src; i < dest; i ++ )
682 this->list[ i ] = this->list[ i + 1 ];
684 this->list[ dest ] = src_entry;
686 mlt_playlist_get_clip_info( this, ¤t_info, current );
687 mlt_producer_seek( mlt_playlist_producer( this ), current_info.start + position );
688 mlt_playlist_virtual_refresh( this );
694 /** Resize the current clip.
697 int mlt_playlist_resize_clip( mlt_playlist this, int clip, mlt_position in, mlt_position out )
699 int error = clip < 0 || clip >= this->count;
700 if ( error == 0 && mlt_playlist_resize_mix( this, clip, in, out ) != 0 )
702 playlist_entry *entry = this->list[ clip ];
703 mlt_producer producer = entry->producer;
707 if ( out <= -1 || out >= mlt_producer_get_length( producer ) )
708 out = mlt_producer_get_length( producer ) - 1;
717 mlt_producer_set_in_and_out( producer, in, out );
722 /** Split a clip on the playlist at the given position.
725 int mlt_playlist_split( mlt_playlist this, int clip, mlt_position position )
727 int error = clip < 0 || clip >= this->count;
730 playlist_entry *entry = this->list[ clip ];
731 if ( position > 0 && position < entry->frame_count )
733 mlt_producer parent = mlt_producer_cut_parent( entry->producer );
734 mlt_producer split = NULL;
735 int in = entry->frame_in;
736 int out = entry->frame_out;
737 mlt_events_block( mlt_playlist_properties( this ), this );
738 mlt_playlist_resize_clip( this, clip, in, in + position );
739 split = mlt_producer_cut( parent, in + position + 1, out );
740 mlt_playlist_insert( this, split, clip + 1, -1, -1 );
741 mlt_events_unblock( mlt_playlist_properties( this ), this );
742 mlt_events_fire( mlt_playlist_properties( this ), "producer-changed", NULL );
752 /** Join 1 or more consecutive clips.
755 int mlt_playlist_join( mlt_playlist this, int clip, int count, int merge )
757 int error = clip < 0 || ( clip + 1 ) >= this->count;
761 mlt_playlist new_clip = mlt_playlist_init( );
762 mlt_events_block( mlt_playlist_properties( this ), this );
763 if ( clip + count >= this->count )
764 count = this->count - clip;
765 for ( i = 0; i <= count; i ++ )
767 playlist_entry *entry = this->list[ clip ];
768 mlt_playlist_append( new_clip, entry->producer );
769 mlt_playlist_remove( this, clip );
771 mlt_events_unblock( mlt_playlist_properties( this ), this );
772 mlt_playlist_insert( this, mlt_playlist_producer( new_clip ), clip, 0, -1 );
773 mlt_playlist_close( new_clip );
778 int mlt_playlist_mix( mlt_playlist this, int clip, int length, mlt_transition transition )
780 int error = ( clip < 0 || clip + 1 >= this->count ) && this->list[ clip ]->mix_out != NULL;
783 playlist_entry *clip_a = this->list[ clip ];
784 playlist_entry *clip_b = this->list[ clip + 1 ];
785 mlt_producer track_a;
786 mlt_producer track_b;
787 mlt_tractor tractor = mlt_tractor_new( );
788 mlt_events_block( mlt_playlist_properties( this ), this );
790 track_a = mlt_producer_cut( clip_a->producer, clip_a->frame_out - length + 1, clip_a->frame_out );
791 mlt_properties_set_int( mlt_producer_properties( track_a ), "cut", 1 );
792 track_b = mlt_producer_cut( clip_b->producer, clip_b->frame_in, clip_b->frame_in + length - 1 );
793 mlt_properties_set_int( mlt_producer_properties( track_b ), "cut", 1 );
795 mlt_tractor_set_track( tractor, track_a, 0 );
796 mlt_tractor_set_track( tractor, track_b, 1 );
797 mlt_playlist_insert( this, mlt_tractor_producer( tractor ), clip + 1, -1, -1 );
798 mlt_properties_set_data( mlt_tractor_properties( tractor ), "mlt_mix", tractor, 0, NULL, NULL );
800 if ( transition != NULL )
802 mlt_field field = mlt_tractor_field( tractor );
803 mlt_field_plant_transition( field, transition, 0, 1 );
804 mlt_transition_set_in_and_out( transition, 0, length - 1 );
807 if ( clip_b->frame_out - clip_b->frame_in > length )
808 mlt_playlist_resize_clip( this, clip + 2, clip_b->frame_in + length, clip_b->frame_out );
810 mlt_playlist_remove( this, clip + 2 );
812 if ( clip_a->frame_out - clip_a->frame_in > length )
813 mlt_playlist_resize_clip( this, clip, clip_a->frame_in, clip_a->frame_out - length );
815 mlt_playlist_remove( this, clip );
817 mlt_events_unblock( mlt_playlist_properties( this ), this );
818 mlt_events_fire( mlt_playlist_properties( this ), "producer-changed", NULL );
819 mlt_producer_close( track_a );
820 mlt_producer_close( track_b );
821 mlt_tractor_close( tractor );
826 static int mlt_playlist_unmix( mlt_playlist this, int clip )
828 int error = ( clip < 0 || clip >= this->count );
830 // Ensure that the clip request is actually a mix
833 mlt_producer producer = this->list[ clip ]->producer;
834 mlt_properties properties = mlt_producer_properties( producer );
835 error = !mlt_properties_get_int( properties, "mlt_mix" );
840 playlist_entry *mix = this->list[ clip ];
841 playlist_entry *clip_a = mix->mix_in;
842 playlist_entry *clip_b = mix->mix_out;
843 int length = mix->mix_in_length;
844 mlt_events_block( mlt_playlist_properties( this ), this );
846 if ( clip_a != NULL )
848 clip_a->frame_out += length;
849 clip_a->frame_count += length;
850 clip_a->mix_out = NULL;
851 clip_a->mix_out_length = 0;
855 mlt_tractor tractor = ( mlt_tractor )mix->producer;
856 mlt_playlist playlist = ( mlt_playlist )mlt_tractor_get_track( tractor, 0 );
857 mlt_producer producer = playlist->list[ 0 ]->producer;
858 mlt_playlist_insert( this, producer, clip, playlist->list[0]->frame_in, playlist->list[0]->frame_out );
862 if ( clip_b != NULL )
864 clip_b->frame_in -= length;
865 clip_b->frame_count += length;
866 clip_b->mix_in = NULL;
867 clip_b->mix_in_length = 0;
871 mlt_tractor tractor = ( mlt_tractor )mix->producer;
872 mlt_playlist playlist = ( mlt_playlist )mlt_tractor_get_track( tractor, 1 );
873 mlt_producer producer = playlist->list[ 0 ]->producer;
874 mlt_playlist_insert( this, producer, clip + 1, playlist->list[0]->frame_in, playlist->list[0]->frame_out );
877 mlt_properties_set_int( mlt_producer_properties( mix->producer ), "mlt_mix", 0 );
878 mlt_playlist_remove( this, clip );
879 mlt_events_unblock( mlt_playlist_properties( this ), this );
880 mlt_events_fire( mlt_playlist_properties( this ), "producer-changed", NULL );
885 static int mlt_playlist_resize_mix( mlt_playlist this, int clip, int in, int out )
887 int error = ( clip < 0 || clip >= this->count );
889 // Ensure that the clip request is actually a mix
892 mlt_producer producer = this->list[ clip ]->producer;
893 mlt_properties properties = mlt_producer_properties( producer );
894 error = !mlt_properties_get_int( properties, "mlt_mix" );
899 playlist_entry *mix = this->list[ clip ];
900 playlist_entry *clip_a = mix->mix_in;
901 playlist_entry *clip_b = mix->mix_out;
902 int length = out - in + 1;
903 int length_diff = length - mix->mix_in_length;
904 mlt_events_block( mlt_playlist_properties( this ), this );
906 if ( clip_a != NULL )
908 clip_a->frame_out -= length_diff;
909 clip_a->frame_count -= length_diff;
910 clip_a->mix_out_length -= length_diff;
913 if ( clip_b != NULL )
915 clip_b->frame_in += length_diff;
916 clip_b->frame_count -= length_diff;
917 clip_b->mix_in_length -= length_diff;
921 mix->frame_out = length - 1;
922 mix->frame_count = length;
923 mix->mix_in_length = length;
924 mix->mix_out_length = length;
926 mlt_events_unblock( mlt_playlist_properties( this ), this );
927 mlt_events_fire( mlt_playlist_properties( this ), "producer-changed", NULL );
932 /** Get the current frame.
935 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
937 // Get this mlt_playlist
938 mlt_playlist this = producer->child;
940 // Get the real producer
941 mlt_service real = mlt_playlist_virtual_seek( this );
944 mlt_service_get_frame( real, frame, index );
946 // Check if we're at the end of the clip
947 mlt_properties properties = mlt_frame_properties( *frame );
948 if ( mlt_properties_get_int( properties, "end_of_clip" ) )
949 mlt_playlist_virtual_set_out( this );
951 // Check for notifier and call with appropriate argument
952 mlt_properties playlist_properties = mlt_producer_properties( producer );
953 void ( *notifier )( void * ) = mlt_properties_get_data( playlist_properties, "notifier", NULL );
954 if ( notifier != NULL )
956 void *argument = mlt_properties_get_data( playlist_properties, "notifier_arg", NULL );
957 notifier( argument );
960 // Update position on the frame we're creating
961 mlt_frame_set_position( *frame, mlt_producer_frame( producer ) );
963 // Position ourselves on the next frame
964 mlt_producer_prepare_next( producer );
969 /** Close the playlist.
972 void mlt_playlist_close( mlt_playlist this )
974 if ( this != NULL && mlt_properties_dec_ref( mlt_playlist_properties( this ) ) <= 0 )
977 this->parent.close = NULL;
978 for ( i = 0; i < this->count; i ++ )
980 mlt_event_close( this->list[ i ]->event );
981 mlt_producer_close( this->list[ i ]->producer );
982 free( this->list[ i ] );
984 mlt_producer_close( &this->blank );
985 mlt_producer_close( &this->parent );