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
;
213 // Decrement position by length of this entry
214 position
-= this->list
[ i
]->frame_count
;
218 // Seek in real producer to relative position
219 if ( producer
!= NULL
)
221 position
+= this->list
[ i
]->frame_in
;
222 position
+= mlt_producer_frame_position( producer
, mlt_producer_get_in( producer
) );
223 mlt_producer_seek_frame( producer
, position
);
225 else if ( total
> 0 )
227 playlist_entry
*entry
= this->list
[ this->count
- 1 ];
228 mlt_producer this_producer
= mlt_playlist_producer( this );
229 mlt_producer_seek_frame( this_producer
, total
);
230 producer
= entry
->producer
;
231 position
= mlt_producer_frame_position( producer
, mlt_producer_get_in( producer
) );
232 mlt_producer_seek_frame( producer
, position
+ entry
->frame_out
);
236 mlt_producer_seek( mlt_playlist_producer( this ), 0 );
237 producer
= &this->blank
;
243 static mlt_producer
mlt_playlist_virtual_set_out( mlt_playlist
this )
245 // Default producer to blank
246 mlt_producer producer
= &this->blank
;
248 // Map playlist position to real producer in virtual playlist
249 mlt_timecode pos
= mlt_producer_position( &this->parent
);
250 int64_t position
= mlt_producer_frame_position( &this->parent
, pos
);
252 // Loop through the virtual playlist
255 for ( i
= 0; i
< this->count
; i
++ )
257 if ( position
< this->list
[ i
]->frame_count
)
259 // Found it, now break
260 producer
= this->list
[ i
]->producer
;
265 // Decrement position by length of this entry
266 position
-= this->list
[ i
]->frame_count
;
270 // Seek in real producer to relative position
271 if ( i
< this->count
)
273 // Update the playtime for the changed clip (hmmm)
274 this->list
[ i
]->frame_count
= position
+ 1;
275 this->list
[ i
]->frame_out
= position
- this->list
[ i
]->frame_in
;
277 // Refresh the playlist
278 mlt_playlist_virtual_refresh( this );
284 int mlt_playlist_current_clip( mlt_playlist
this )
286 // Map playlist position to real producer in virtual playlist
287 mlt_timecode pos
= mlt_producer_position( &this->parent
);
288 int64_t position
= mlt_producer_frame_position( &this->parent
, pos
);
290 // Loop through the virtual playlist
293 for ( i
= 0; i
< this->count
; i
++ )
295 if ( position
< this->list
[ i
]->frame_count
)
297 // Found it, now break
302 // Decrement position by length of this entry
303 position
-= this->list
[ i
]->frame_count
;
310 mlt_producer
mlt_playlist_current( mlt_playlist
this )
312 int i
= mlt_playlist_current_clip( this );
313 if ( i
< this->count
)
314 return this->list
[ i
]->producer
;
319 /** Get the timecode which corresponds to the start of the next clip.
322 mlt_timecode
mlt_playlist_clip( mlt_playlist
this, mlt_whence whence
, int index
)
324 int64_t position
= 0;
325 int absolute_clip
= index
;
328 // Determine the absolute clip
331 case mlt_whence_relative_start
:
332 absolute_clip
= index
;
335 case mlt_whence_relative_current
:
336 absolute_clip
= mlt_playlist_current_clip( this ) + index
;
339 case mlt_whence_relative_end
:
340 absolute_clip
= this->count
- index
;
344 // Check that we're in a valid range
345 if ( absolute_clip
< 0 )
347 else if ( absolute_clip
> this->count
)
348 absolute_clip
= this->count
;
350 // Now determine the timecode
351 for ( i
= 0; i
< absolute_clip
; i
++ )
352 position
+= this->list
[ i
]->frame_count
;
354 return mlt_producer_time( &this->parent
, position
);
357 int mlt_playlist_get_clip_info( mlt_playlist
this, mlt_playlist_clip_info
*info
, int index
)
359 int error
= index
< 0 || index
>= this->count
;
360 memset( info
, 0, sizeof( mlt_playlist_clip_info
) );
363 mlt_producer producer
= this->list
[ index
]->producer
;
364 mlt_properties properties
= mlt_producer_properties( producer
);
365 info
->producer
= producer
;
366 info
->start
= mlt_playlist_clip( this, mlt_whence_relative_start
, index
);
367 info
->resource
= mlt_properties_get( properties
, "resource" );
368 info
->frame_in
= this->list
[ index
]->frame_in
;
369 info
->in
= mlt_producer_time( producer
, info
->frame_in
);
370 info
->frame_out
= this->list
[ index
]->frame_out
;
371 info
->out
= mlt_producer_time( producer
, info
->frame_out
);
372 info
->playtime
= this->list
[ index
]->playtime
;
373 info
->length
= mlt_producer_get_length( producer
);
374 info
->fps
= mlt_producer_get_fps( producer
);
379 /** Get number of clips in the playlist.
382 int mlt_playlist_count( mlt_playlist
this )
387 /** Clear the playlist.
390 int mlt_playlist_clear( mlt_playlist
this )
393 mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", 0 );
394 return mlt_playlist_virtual_refresh( this );
397 /** Append a producer to the playlist.
400 int mlt_playlist_append( mlt_playlist
this, mlt_producer producer
)
402 // Append to virtual list
403 int64_t in
= mlt_producer_frame_position( producer
, mlt_producer_get_in( producer
) );
404 int64_t out
= mlt_producer_frame_position( producer
, mlt_producer_get_out( producer
) );
405 return mlt_playlist_virtual_append( this, producer
, 0, out
- in
);
408 /** Append a producer to the playlist with in/out points.
411 int mlt_playlist_append_io( mlt_playlist
this, mlt_producer producer
, double in
, double out
)
413 // Append to virtual list
414 if ( in
!= -1 && out
!= -1 )
416 int64_t fin
= mlt_producer_frame_position( producer
, in
);
417 int64_t fout
= mlt_producer_frame_position( producer
, out
);
418 return mlt_playlist_virtual_append( this, producer
, 0, fout
- fin
);
422 return mlt_playlist_append( this, producer
);
426 /** Append a blank to the playlist of a given length.
429 int mlt_playlist_blank( mlt_playlist
this, mlt_timecode length
)
431 // Append to the virtual list
432 int64_t fout
= mlt_producer_frame_position( &this->blank
, length
);
433 return mlt_playlist_virtual_append( this, &this->blank
, 0, fout
);
436 /** Insert a producer into the playlist.
439 int mlt_playlist_insert( mlt_playlist
this, mlt_producer producer
, int where
, mlt_timecode in
, mlt_timecode out
)
444 int mlt_playlist_remove( mlt_playlist
this, int where
)
449 int mlt_playlist_move( mlt_playlist
this, int from
, int to
)
454 int mlt_playlist_resize_clip( mlt_playlist
this, int clip
, mlt_timecode in
, mlt_timecode out
)
456 int error
= clip
< 0 || clip
>= this->count
;
459 playlist_entry
*entry
= this->list
[ clip
];
460 mlt_producer producer
= entry
->producer
;
464 if ( out
<= -1 || out
>= mlt_producer_get_out( producer
) )
465 out
= mlt_producer_get_out( producer
);
474 int64_t fin
= mlt_producer_frame_position( producer
, in
);
475 int64_t fout
= mlt_producer_frame_position( producer
, out
);
477 entry
->frame_in
= fin
;
478 entry
->frame_out
= fout
;
479 entry
->frame_count
= fout
- fin
+ 1;
480 entry
->playtime
= out
- in
;
481 mlt_playlist_virtual_refresh( this );
486 /** Get the current frame.
489 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
491 // Get this mlt_playlist
492 mlt_playlist
this = producer
->child
;
494 // Get the real producer
495 mlt_producer real
= mlt_playlist_virtual_seek( this );
498 mlt_service_get_frame( mlt_producer_service( real
), frame
, index
);
500 // Check if we're at the end of the clip
501 mlt_properties properties
= mlt_frame_properties( *frame
);
502 if ( mlt_properties_get_int( properties
, "end_of_clip" ) )
503 mlt_playlist_virtual_set_out( this );
505 // Check for notifier and call with appropriate argument
506 mlt_properties playlist_properties
= mlt_producer_properties( producer
);
507 void ( *notifier
)( void * ) = mlt_properties_get_data( playlist_properties
, "notifier", NULL
);
508 if ( notifier
!= NULL
)
510 void *argument
= mlt_properties_get_data( playlist_properties
, "notifier_arg", NULL
);
511 notifier( argument
);
514 // Update timecode on the frame we're creating
515 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
517 // Position ourselves on the next frame
518 mlt_producer_prepare_next( producer
);
523 /** Close the playlist.
526 void mlt_playlist_close( mlt_playlist
this )
528 mlt_producer_close( &this->parent
);
529 mlt_producer_close( &this->blank
);