f786d31d0c10e45296af3feb593fefe1bcef0708
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"
28 /** Virtual playlist entry.
33 mlt_producer producer
;
35 mlt_timecode playtime
;
39 /** Private definition.
44 struct mlt_producer_s parent
;
52 playlist_entry
**virtual_list
;
55 /** Forward declarations
58 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
63 mlt_playlist
mlt_playlist_init( )
65 mlt_playlist
this = calloc( sizeof( struct mlt_playlist_s
), 1 );
68 mlt_producer producer
= &this->parent
;
70 // Construct the producer
71 mlt_producer_init( producer
, this );
73 // Override the producer get_frame
74 producer
->get_frame
= producer_get_frame
;
77 this->blank
= calloc( sizeof( struct mlt_producer_s
), 1 );
80 mlt_producer_init( this->blank
, NULL
);
86 /** Get the producer associated to this playlist.
89 mlt_producer
mlt_playlist_producer( mlt_playlist
this )
94 /** Get the service associated to this playlist.
97 mlt_service
mlt_playlist_service( mlt_playlist
this )
99 return mlt_producer_service( &this->parent
);
102 /** Store a producer in the playlist.
105 static int mlt_playlist_store( mlt_playlist
this, mlt_producer producer
)
109 // If it's already added, return the index
110 for ( i
= 0; i
< this->count
; i
++ )
112 if ( producer
== this->list
[ i
] )
116 // Check that we have room
117 if ( this->count
>= this->size
)
119 this->list
= realloc( this->list
, ( this->size
+ 10 ) * sizeof( mlt_producer
) );
120 for ( i
= this->size
; i
< this->size
+ 10; i
++ )
121 this->list
[ i
] = NULL
;
125 // Add this producer to the list
126 this->list
[ this->count
] = producer
;
128 return this->count
++;
131 /** Append to the virtual playlist.
134 static int mlt_playlist_virtual_append( mlt_playlist
this, int position
, mlt_timecode in
, mlt_timecode out
)
136 // Check that we have room
137 if ( this->virtual_count
>= this->virtual_size
)
140 this->virtual_list
= realloc( this->virtual_list
, ( this->virtual_size
+ 10 ) * sizeof( playlist_entry
* ) );
141 for ( i
= this->virtual_size
; i
< this->virtual_size
+ 10; i
++ )
142 this->virtual_list
[ i
] = NULL
;
143 this->virtual_size
+= 10;
146 this->virtual_list
[ this->virtual_count
] = malloc( sizeof( playlist_entry
) );
147 this->virtual_list
[ this->virtual_count
]->producer
= this->list
[ position
];
148 this->virtual_list
[ this->virtual_count
]->in
= in
;
149 this->virtual_list
[ this->virtual_count
]->playtime
= out
- in
;
151 this->virtual_count
++;
156 /** Seek in the virtual playlist.
159 static mlt_producer
mlt_playlist_virtual_seek( mlt_playlist
this )
161 // Default producer to blank
162 mlt_producer producer
= this->blank
;
164 // Map playlist position to real producer in virtual playlist
165 mlt_timecode position
= mlt_producer_position( &this->parent
);
167 // Loop through the virtual playlist
170 for ( i
= 0; i
< this->virtual_count
; i
++ )
172 if ( position
< this->virtual_list
[ i
]->playtime
)
174 // Found it, now break
175 producer
= this->virtual_list
[ i
]->producer
;
176 position
+= this->virtual_list
[ i
]->in
;
181 // Decrement position by length of this entry
182 position
-= this->virtual_list
[ i
]->playtime
;
186 // Seek in real producer to relative position
187 mlt_producer_seek( producer
, position
);
192 /** Append a producer to the playlist.
195 int mlt_playlist_append( mlt_playlist
this, mlt_producer producer
)
197 // Get the position of the producer in the list
198 int position
= mlt_playlist_store( this, producer
);
200 // Append to virtual list
201 mlt_playlist_virtual_append( this, position
, 0, mlt_producer_get_playtime( producer
) );
206 /** Append a blank to the playlist of a given length.
209 int mlt_playlist_blank( mlt_playlist
this, mlt_timecode length
)
211 // Get the position of the producer in the list
212 int position
= mlt_playlist_store( this, this->blank
);
214 // Append to the virtual list
215 mlt_playlist_virtual_append( this, position
, 0, length
);
220 /** Get the current frame.
223 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
225 // Get this mlt_playlist
226 mlt_playlist
this = producer
->child
;
228 // Get the real producer
229 mlt_producer real
= mlt_playlist_virtual_seek( this );
232 mlt_service_get_frame( mlt_producer_service( real
), frame
, index
);
234 // Update timecode on the frame we're creating
235 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
237 // Position ourselves on the next frame
238 mlt_producer_prepare_next( producer
);
243 /** Close the playlist.
246 void mlt_playlist_close( mlt_playlist
this )
248 mlt_producer_close( &this->parent
);
249 mlt_producer_close( this->blank
);