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_frame.h"
30 /** Virtual playlist entry.
35 mlt_producer producer
;
39 mlt_timecode playtime
;
43 /** Private definition.
48 struct mlt_producer_s parent
;
49 struct mlt_producer_s blank
;
53 playlist_entry
**list
;
56 /** Forward declarations
59 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
64 mlt_playlist
mlt_playlist_init( )
66 mlt_playlist
this = calloc( sizeof( struct mlt_playlist_s
), 1 );
69 mlt_producer producer
= &this->parent
;
71 // Construct the producer
72 mlt_producer_init( producer
, this );
74 // Override the producer get_frame
75 producer
->get_frame
= producer_get_frame
;
78 mlt_producer_init( &this->blank
, NULL
);
80 // Indicate that this producer is a playlist
81 mlt_properties_set_data( mlt_playlist_properties( this ), "playlist", this, 0, NULL
, NULL
);
87 /** Get the producer associated to this playlist.
90 mlt_producer
mlt_playlist_producer( mlt_playlist
this )
95 /** Get the service associated to this playlist.
98 mlt_service
mlt_playlist_service( mlt_playlist
this )
100 return mlt_producer_service( &this->parent
);
103 /** Get the propertues associated to this playlist.
106 mlt_properties
mlt_playlist_properties( mlt_playlist
this )
108 return mlt_producer_properties( &this->parent
);
111 static int mlt_playlist_virtual_refresh( mlt_playlist
this )
115 // Get the fps of the first producer
116 double fps
= mlt_properties_get_double( mlt_playlist_properties( this ), "first_fps" );
117 mlt_timecode playtime
= 0;
119 for ( i
= 0; i
< this->count
; i
++ )
122 mlt_producer producer
= this->list
[ i
]->producer
;
127 // Inherit it from the producer
128 fps
= mlt_producer_get_fps( producer
);
130 else if ( fps
!= mlt_properties_get_double( mlt_producer_properties( producer
), "fps" ) )
132 // Generate a warning for now - the following attempt to fix may fail
133 fprintf( stderr
, "Warning: fps mismatch on playlist producer %d\n", this->count
);
135 // It should be safe to impose fps on an image producer, but not necessarily safe for video
136 mlt_properties_set_double( mlt_producer_properties( producer
), "fps", fps
);
139 // Update the playtime for this clip
140 playtime
+= this->list
[ i
]->playtime
;
143 // Refresh all properties
144 mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", fps
);
145 mlt_properties_set_double( mlt_playlist_properties( this ), "fps", fps
== 0 ?
25 : fps
);
146 mlt_properties_set_timecode( mlt_playlist_properties( this ), "length", playtime
);
147 mlt_properties_set_timecode( mlt_playlist_properties( this ), "out", playtime
);
152 /** Append to the virtual playlist.
155 static int mlt_playlist_virtual_append( mlt_playlist
this, mlt_producer producer
, int64_t in
, int64_t out
)
157 double fps
= mlt_properties_get_double( mlt_playlist_properties( this ), "fps" );
158 double playtime
= ( double )( out
- in
+ 1 ) / fps
;
160 // Check that we have room
161 if ( this->count
>= this->size
)
164 this->list
= realloc( this->list
, ( this->size
+ 10 ) * sizeof( playlist_entry
* ) );
165 for ( i
= this->size
; i
< this->size
+ 10; i
++ )
166 this->list
[ i
] = NULL
;
170 this->list
[ this->count
] = calloc( sizeof( playlist_entry
), 1 );
171 this->list
[ this->count
]->producer
= producer
;
172 this->list
[ this->count
]->frame_in
= in
;
173 this->list
[ this->count
]->frame_out
= out
;
174 this->list
[ this->count
]->frame_count
= out
- in
+ 1;
175 this->list
[ this->count
]->playtime
= playtime
;
177 mlt_producer_set_speed( producer
, 0 );
181 return mlt_playlist_virtual_refresh( this );
184 /** Seek in the virtual playlist.
187 static mlt_producer
mlt_playlist_virtual_seek( mlt_playlist
this )
189 // Default producer to blank
190 mlt_producer producer
= NULL
;
192 // Map playlist position to real producer in virtual playlist
193 mlt_timecode pos
= mlt_producer_position( &this->parent
);
194 int64_t position
= mlt_producer_frame_position( &this->parent
, pos
);
197 // Loop through the virtual playlist
200 for ( i
= 0; i
< this->count
; i
++ )
202 // Increment the total
203 total
+= this->list
[ i
]->frame_count
;
205 if ( position
< this->list
[ i
]->frame_count
)
207 // Found it, now break
208 producer
= this->list
[ i
]->producer
;
209 position
+= this->list
[ i
]->frame_in
;
214 // Decrement position by length of this entry
215 position
-= this->list
[ i
]->frame_count
;
219 // Seek in real producer to relative position
220 if ( producer
!= NULL
)
222 mlt_producer_seek_frame( producer
, position
);
224 else if ( total
> 0 )
226 playlist_entry
*entry
= this->list
[ this->count
- 1 ];
227 mlt_producer this_producer
= mlt_playlist_producer( this );
228 mlt_producer_seek_frame( this_producer
, total
- 1 );
229 producer
= entry
->producer
;
230 mlt_producer_seek_frame( producer
, entry
->frame_out
);
234 mlt_producer_seek( mlt_playlist_producer( this ), 0 );
235 producer
= &this->blank
;
241 static mlt_producer
mlt_playlist_virtual_set_out( mlt_playlist
this )
243 // Default producer to blank
244 mlt_producer producer
= &this->blank
;
246 // Map playlist position to real producer in virtual playlist
247 mlt_timecode pos
= mlt_producer_position( &this->parent
);
248 int64_t position
= mlt_producer_frame_position( &this->parent
, pos
);
250 // Loop through the virtual playlist
253 for ( i
= 0; i
< this->count
; i
++ )
255 if ( position
< this->list
[ i
]->frame_count
)
257 // Found it, now break
258 producer
= this->list
[ i
]->producer
;
263 // Decrement position by length of this entry
264 position
-= this->list
[ i
]->frame_count
;
268 // Seek in real producer to relative position
269 if ( i
< this->count
)
271 // Update the playtime for the changed clip (hmmm)
272 this->list
[ i
]->frame_count
= position
+ 1;
273 this->list
[ i
]->frame_out
= position
- this->list
[ i
]->frame_in
;
275 // Refresh the playlist
276 mlt_playlist_virtual_refresh( this );
282 int mlt_playlist_current_clip( mlt_playlist
this )
284 // Map playlist position to real producer in virtual playlist
285 mlt_timecode pos
= mlt_producer_position( &this->parent
);
286 int64_t position
= mlt_producer_frame_position( &this->parent
, pos
);
288 // Loop through the virtual playlist
291 for ( i
= 0; i
< this->count
; i
++ )
293 if ( position
< this->list
[ i
]->frame_count
)
295 // Found it, now break
300 // Decrement position by length of this entry
301 position
-= this->list
[ i
]->frame_count
;
308 mlt_producer
mlt_playlist_current( mlt_playlist
this )
310 int i
= mlt_playlist_current_clip( this );
311 if ( i
< this->count
)
312 return this->list
[ i
]->producer
;
317 /** Get the timecode which corresponds to the start of the next clip.
320 mlt_timecode
mlt_playlist_clip( mlt_playlist
this, mlt_whence whence
, int index
)
322 int64_t position
= 0;
323 int absolute_clip
= index
;
326 // Determine the absolute clip
329 case mlt_whence_relative_start
:
330 absolute_clip
= index
;
333 case mlt_whence_relative_current
:
334 absolute_clip
= mlt_playlist_current_clip( this ) + index
;
337 case mlt_whence_relative_end
:
338 absolute_clip
= this->count
- index
;
342 // Check that we're in a valid range
343 if ( absolute_clip
< 0 )
345 else if ( absolute_clip
> this->count
)
346 absolute_clip
= this->count
;
348 // Now determine the timecode
349 for ( i
= 0; i
< absolute_clip
; i
++ )
350 position
+= this->list
[ i
]->frame_count
;
352 return mlt_producer_time( &this->parent
, position
);
355 int mlt_playlist_get_clip_info( mlt_playlist
this, mlt_playlist_clip_info
*info
, int index
)
357 int error
= index
< 0 || index
>= this->count
;
358 memset( info
, 0, sizeof( mlt_playlist_clip_info
) );
361 mlt_producer producer
= this->list
[ index
]->producer
;
362 mlt_properties properties
= mlt_producer_properties( producer
);
363 info
->producer
= producer
;
364 info
->start
= mlt_playlist_clip( this, mlt_whence_relative_start
, index
);
365 info
->resource
= mlt_properties_get( properties
, "resource" );
366 info
->frame_in
= this->list
[ index
]->frame_in
;
367 info
->in
= mlt_producer_time( producer
, info
->frame_in
);
368 info
->frame_out
= this->list
[ index
]->frame_out
;
369 info
->out
= mlt_producer_time( producer
, info
->frame_out
);
370 info
->playtime
= this->list
[ index
]->playtime
;
371 info
->length
= mlt_producer_get_length( producer
);
372 info
->fps
= mlt_producer_get_fps( producer
);
377 /** Get number of clips in the playlist.
380 int mlt_playlist_count( mlt_playlist
this )
385 /** Clear the playlist.
388 int mlt_playlist_clear( mlt_playlist
this )
391 mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", 0 );
392 return mlt_playlist_virtual_refresh( this );
395 /** Append a producer to the playlist.
398 int mlt_playlist_append( mlt_playlist
this, mlt_producer producer
)
400 // Append to virtual list
401 int64_t out
= mlt_producer_frame_position( producer
, mlt_producer_get_out( producer
) );
402 return mlt_playlist_virtual_append( this, producer
, 0, out
);
405 /** Append a producer to the playlist with in/out points.
408 int mlt_playlist_append_io( mlt_playlist
this, mlt_producer producer
, double in
, double out
)
410 // Append to virtual list
411 if ( in
!= -1 && out
!= -1 )
413 int64_t fin
= mlt_producer_frame_position( producer
, in
);
414 int64_t fout
= mlt_producer_frame_position( producer
, out
);
415 return mlt_playlist_virtual_append( this, producer
, fin
, fout
);
419 return mlt_playlist_append( this, producer
);
423 /** Append a blank to the playlist of a given length.
426 int mlt_playlist_blank( mlt_playlist
this, mlt_timecode length
)
428 // Append to the virtual list
429 int64_t fout
= mlt_producer_frame_position( &this->blank
, length
);
430 return mlt_playlist_virtual_append( this, &this->blank
, 0, fout
);
433 /** Insert a producer into the playlist.
436 int mlt_playlist_insert( mlt_playlist
this, mlt_producer producer
, int where
, mlt_timecode in
, mlt_timecode out
)
441 int mlt_playlist_remove( mlt_playlist
this, int where
)
446 int mlt_playlist_move( mlt_playlist
this, int from
, int to
)
451 int mlt_playlist_resize_clip( mlt_playlist
this, int clip
, mlt_timecode in
, mlt_timecode out
)
453 int error
= clip
< 0 || clip
>= this->count
;
456 playlist_entry
*entry
= this->list
[ clip
];
457 mlt_producer producer
= entry
->producer
;
461 if ( out
<= -1 || out
>= mlt_producer_get_out( producer
) )
462 out
= mlt_producer_get_out( producer
);
471 int64_t fin
= mlt_producer_frame_position( producer
, in
);
472 int64_t fout
= mlt_producer_frame_position( producer
, out
);
474 entry
->frame_in
= fin
;
475 entry
->frame_out
= fout
;
476 entry
->frame_count
= fout
- fin
+ 1;
477 entry
->playtime
= out
- in
;
478 mlt_playlist_virtual_refresh( this );
483 /** Get the current frame.
486 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
488 // Get this mlt_playlist
489 mlt_playlist
this = producer
->child
;
491 // Get the real producer
492 mlt_producer real
= mlt_playlist_virtual_seek( this );
495 mlt_service_get_frame( mlt_producer_service( real
), frame
, index
);
497 // Check if we're at the end of the clip
498 mlt_properties properties
= mlt_frame_properties( *frame
);
499 if ( mlt_properties_get_int( properties
, "end_of_clip" ) )
500 mlt_playlist_virtual_set_out( this );
502 // Check for notifier and call with appropriate argument
503 mlt_properties playlist_properties
= mlt_producer_properties( producer
);
504 void ( *notifier
)( void * ) = mlt_properties_get_data( playlist_properties
, "notifier", NULL
);
505 if ( notifier
!= NULL
)
507 void *argument
= mlt_properties_get_data( playlist_properties
, "notifier_arg", NULL
);
508 notifier( argument
);
511 // Update timecode on the frame we're creating
512 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
514 // Position ourselves on the next frame
515 mlt_producer_prepare_next( producer
);
520 /** Close the playlist.
523 void mlt_playlist_close( mlt_playlist
this )
525 mlt_producer_close( &this->parent
);
526 mlt_producer_close( &this->blank
);