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
;
37 mlt_timecode playtime
;
41 /** Private definition.
46 struct mlt_producer_s parent
;
47 struct mlt_producer_s blank
;
51 playlist_entry
**list
;
54 /** Forward declarations
57 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
62 mlt_playlist
mlt_playlist_init( )
64 mlt_playlist
this = calloc( sizeof( struct mlt_playlist_s
), 1 );
67 mlt_producer producer
= &this->parent
;
69 // Construct the producer
70 mlt_producer_init( producer
, this );
72 // Override the producer get_frame
73 producer
->get_frame
= producer_get_frame
;
76 mlt_producer_init( &this->blank
, NULL
);
78 // Indicate that this producer is a playlist
79 mlt_properties_set_data( mlt_playlist_properties( this ), "playlist", this, 0, NULL
, NULL
);
85 /** Get the producer associated to this playlist.
88 mlt_producer
mlt_playlist_producer( mlt_playlist
this )
93 /** Get the service associated to this playlist.
96 mlt_service
mlt_playlist_service( mlt_playlist
this )
98 return mlt_producer_service( &this->parent
);
101 /** Get the propertues associated to this playlist.
104 mlt_properties
mlt_playlist_properties( mlt_playlist
this )
106 return mlt_producer_properties( &this->parent
);
109 static int mlt_playlist_virtual_refresh( mlt_playlist
this )
113 // Get the fps of the first producer
114 double fps
= mlt_properties_get_double( mlt_playlist_properties( this ), "first_fps" );
115 mlt_timecode playtime
= 0;
117 for ( i
= 0; i
< this->count
; i
++ )
120 mlt_producer producer
= this->list
[ i
]->producer
;
125 // Inherit it from the producer
126 fps
= mlt_producer_get_fps( producer
);
128 else if ( fps
!= mlt_properties_get_double( mlt_producer_properties( producer
), "fps" ) )
130 // Generate a warning for now - the following attempt to fix may fail
131 fprintf( stderr
, "Warning: fps mismatch on playlist producer %d\n", this->count
);
133 // It should be safe to impose fps on an image producer, but not necessarily safe for video
134 mlt_properties_set_double( mlt_producer_properties( producer
), "fps", fps
);
137 // Update the playtime for this clip
138 playtime
+= this->list
[ i
]->playtime
;
141 // Refresh all properties
142 mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", fps
);
143 mlt_properties_set_double( mlt_playlist_properties( this ), "fps", fps
== 0 ?
25 : fps
);
144 mlt_properties_set_timecode( mlt_playlist_properties( this ), "length", playtime
);
145 mlt_properties_set_timecode( mlt_playlist_properties( this ), "out", playtime
);
150 /** Append to the virtual playlist.
153 static int mlt_playlist_virtual_append( mlt_playlist
this, mlt_producer producer
, mlt_timecode in
, mlt_timecode playtime
)
155 // Check that we have room
156 if ( this->count
>= this->size
)
159 this->list
= realloc( this->list
, ( this->size
+ 10 ) * sizeof( playlist_entry
* ) );
160 for ( i
= this->size
; i
< this->size
+ 10; i
++ )
161 this->list
[ i
] = NULL
;
165 this->list
[ this->count
] = calloc( sizeof( playlist_entry
), 1 );
166 this->list
[ this->count
]->producer
= producer
;
167 this->list
[ this->count
]->in
= in
;
168 this->list
[ this->count
]->playtime
= playtime
;
172 return mlt_playlist_virtual_refresh( this );
175 /** Seek in the virtual playlist.
178 static mlt_producer
mlt_playlist_virtual_seek( mlt_playlist
this )
180 // Default producer to blank
181 mlt_producer producer
= &this->blank
;
183 // Map playlist position to real producer in virtual playlist
184 mlt_timecode position
= mlt_producer_position( &this->parent
);
186 // Loop through the virtual playlist
189 for ( i
= 0; i
< this->count
; i
++ )
191 if ( position
< this->list
[ i
]->playtime
)
193 // Found it, now break
194 producer
= this->list
[ i
]->producer
;
195 position
+= this->list
[ i
]->in
;
200 // Decrement position by length of this entry
201 position
-= this->list
[ i
]->playtime
;
205 // Seek in real producer to relative position
206 mlt_producer_seek( producer
, position
);
211 static mlt_producer
mlt_playlist_virtual_set_out( mlt_playlist
this )
213 // Default producer to blank
214 mlt_producer producer
= &this->blank
;
216 // Map playlist position to real producer in virtual playlist
217 mlt_timecode position
= mlt_producer_position( &this->parent
);
219 // Loop through the virtual playlist
222 for ( i
= 0; i
< this->count
; i
++ )
224 if ( position
< this->list
[ i
]->playtime
)
226 // Found it, now break
227 producer
= this->list
[ i
]->producer
;
228 position
+= this->list
[ i
]->in
;
233 // Decrement position by length of this entry
234 position
-= this->list
[ i
]->playtime
;
238 // Seek in real producer to relative position
239 if ( i
< this->count
)
241 // Update the playtime for the changed clip (hmmm)
242 this->list
[ i
]->playtime
= position
- this->list
[ i
]->in
;
244 // Refresh the playlist
245 mlt_playlist_virtual_refresh( this );
251 int mlt_playlist_current_clip( mlt_playlist
this )
253 // Map playlist position to real producer in virtual playlist
254 mlt_timecode position
= mlt_producer_position( &this->parent
);
256 // Loop through the virtual playlist
259 for ( i
= 0; i
< this->count
; i
++ )
261 if ( position
< this->list
[ i
]->playtime
)
263 // Found it, now break
268 // Decrement position by length of this entry
269 position
-= this->list
[ i
]->playtime
;
276 mlt_producer
mlt_playlist_current( mlt_playlist
this )
278 int i
= mlt_playlist_current_clip( this );
279 if ( i
< this->count
)
280 return this->list
[ i
]->producer
;
285 /** Get the timecode which corresponds to the start of the next clip.
288 mlt_timecode
mlt_playlist_clip( mlt_playlist
this, mlt_whence whence
, int index
)
290 mlt_timecode position
= 0;
291 int absolute_clip
= index
;
294 // Determine the absolute clip
297 case mlt_whence_relative_start
:
298 absolute_clip
= index
;
301 case mlt_whence_relative_current
:
302 absolute_clip
= mlt_playlist_current_clip( this ) + index
;
305 case mlt_whence_relative_end
:
306 absolute_clip
= this->count
- index
;
310 // Check that we're in a valid range
311 if ( absolute_clip
< 0 )
313 else if ( absolute_clip
> this->count
)
314 absolute_clip
= this->count
;
316 // Now determine the timecode
317 for ( i
= 0; i
< absolute_clip
; i
++ )
318 position
+= this->list
[ i
]->playtime
;
323 int mlt_playlist_get_clip_info( mlt_playlist
this, mlt_playlist_clip_info
*info
, int index
)
325 int error
= index
< 0 || index
>= this->count
;
326 memset( info
, 0, sizeof( mlt_playlist_clip_info
) );
329 mlt_producer producer
= this->list
[ index
]->producer
;
330 mlt_properties properties
= mlt_producer_properties( producer
);
331 info
->producer
= producer
;
332 info
->start
= mlt_playlist_clip( this, mlt_whence_relative_start
, index
);
333 info
->resource
= mlt_properties_get( properties
, "resource" );
334 info
->in
= this->list
[ index
]->in
;
335 info
->out
= this->list
[ index
]->in
+ this->list
[ index
]->playtime
;
336 info
->playtime
= this->list
[ index
]->playtime
;
337 info
->length
= mlt_producer_get_length( producer
);
338 info
->fps
= mlt_producer_get_fps( producer
);
343 /** Get number of clips in the playlist.
346 int mlt_playlist_count( mlt_playlist
this )
351 /** Clear the playlist.
354 int mlt_playlist_clear( mlt_playlist
this )
357 mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", 0 );
358 return mlt_playlist_virtual_refresh( this );
361 /** Append a producer to the playlist.
364 int mlt_playlist_append( mlt_playlist
this, mlt_producer producer
)
366 // Append to virtual list
367 return mlt_playlist_virtual_append( this, producer
, 0, mlt_producer_get_playtime( producer
) );
370 /** Append a producer to the playlist with in/out points.
373 int mlt_playlist_append_io( mlt_playlist
this, mlt_producer producer
, double in
, double out
)
375 // Append to virtual list
376 if ( in
!= -1 && out
!= -1 )
377 return mlt_playlist_virtual_append( this, producer
, in
, out
- in
);
379 return mlt_playlist_virtual_append( this, producer
, 0, mlt_producer_get_playtime( producer
) );
382 /** Append a blank to the playlist of a given length.
385 int mlt_playlist_blank( mlt_playlist
this, mlt_timecode length
)
387 // Append to the virtual list
388 return mlt_playlist_virtual_append( this, &this->blank
, 0, length
);
391 /** Insert a producer into the playlist.
394 int mlt_playlist_insert( mlt_playlist
this, mlt_producer producer
, int where
, mlt_timecode in
, mlt_timecode out
)
399 int mlt_playlist_remove( mlt_playlist
this, int where
)
404 int mlt_playlist_move( mlt_playlist
this, int from
, int to
)
409 int mlt_playlist_resize_clip( mlt_playlist
this, int clip
, mlt_timecode in
, mlt_timecode out
)
411 int error
= clip
< 0 || clip
>= this->count
;
414 playlist_entry
*entry
= this->list
[ clip
];
415 mlt_producer producer
= entry
->producer
;
419 if ( out
<= -1 || out
>= mlt_producer_get_out( producer
) )
420 out
= mlt_producer_get_out( producer
);
430 entry
->playtime
= out
- in
;
431 mlt_playlist_virtual_refresh( this );
436 /** Get the current frame.
439 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
441 // Get this mlt_playlist
442 mlt_playlist
this = producer
->child
;
444 // Get the real producer
445 mlt_producer real
= mlt_playlist_virtual_seek( this );
448 mlt_service_get_frame( mlt_producer_service( real
), frame
, index
);
450 // Check if we're at the end of the clip
451 mlt_properties properties
= mlt_frame_properties( *frame
);
452 if ( mlt_properties_get_int( properties
, "end_of_clip" ) )
453 mlt_playlist_virtual_set_out( this );
455 // Check for notifier and call with appropriate argument
456 mlt_properties playlist_properties
= mlt_producer_properties( producer
);
457 void ( *notifier
)( void * ) = mlt_properties_get_data( playlist_properties
, "notifier", NULL
);
458 if ( notifier
!= NULL
)
460 void *argument
= mlt_properties_get_data( playlist_properties
, "notifier_arg", NULL
);
461 notifier( argument
);
464 // Update timecode on the frame we're creating
465 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
467 // Position ourselves on the next frame
468 mlt_producer_prepare_next( producer
);
473 /** Close the playlist.
476 void mlt_playlist_close( mlt_playlist
this )
478 mlt_producer_close( &this->parent
);
479 mlt_producer_close( &this->blank
);