research.m1stereo.tv/gitweb/ - melted/blob - src/framework/mlt_playlist.h

   1 /**
   2  * \file mlt_playlist.h
   3  * \brief playlist service class
   4  * \see mlt_playlist_s
   5  *
   6  * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
   7  * \author Charles Yates <charles.yates@pandora.be>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #ifndef _MLT_PLAYLIST_H_
  25 #define _MLT_PLAYLIST_H_
  26
  27 #include "mlt_producer.h"
  28
  29 /** \brief structure for returning clip information from a playlist entry
  30  */
  31
  32 typedef struct
  33 {
  34         int clip;                 /**< the index of the clip within the playlist */
  35         mlt_producer producer;    /**< the clip's producer (or parent producer of a cut) */
  36         mlt_producer cut;         /**< the clips' cut producer */
  37         mlt_position start;       /**< the time this begins relative to the beginning of the playlist */
  38         char *resource;           /**< the file name or address of the clip */
  39         mlt_position frame_in;    /**< the clip's in point */
  40         mlt_position frame_out;   /**< the clip's out point */
  41         mlt_position frame_count; /**< the duration of the clip */
  42         mlt_position length;      /**< the unedited duration of the clip */
  43         float fps;                /**< the frame rate of the clip */
  44         int repeat;               /**< the number of times the clip is repeated */
  45 }
  46 mlt_playlist_clip_info;
  47
  48 /** Playlist Entry
  49 */
  50
  51 typedef struct playlist_entry_s playlist_entry;
  52
  53 /** \brief Playlist class
  54  *
  55  * A playlist is a sequential container of producers and blank spaces. The class provides all
  56  * sorts of playlist assembly and manipulation routines. A playlist is also a producer within
  57  * the framework.
  58  *
  59  * \extends mlt_producer_s
  60  * \properties \em autoclose Set this true if you are doing sequential processing and want to
  61  * automatically close producers as they are finished being used to free resources.
  62  * \properties \em meta.fx_cut Set true on a producer to indicate that it is a "fx_cut,"
  63  * which is a way to add filters as a playlist entry - useful only in a multitrack. See FxCut on the wiki.
  64  * \properties \em mix_in
  65  * \properties \em mix_out
  66  */
  67
  68 struct mlt_playlist_s
  69 {
  70         struct mlt_producer_s parent;
  71         struct mlt_producer_s blank;
  72
  73         int size;
  74         int count;
  75         playlist_entry **list;
  76 };
  77
  78 #define MLT_PLAYLIST_PRODUCER( playlist )       ( &( playlist )->parent )
  79 #define MLT_PLAYLIST_SERVICE( playlist )        MLT_PRODUCER_SERVICE( MLT_PLAYLIST_PRODUCER( playlist ) )
  80 #define MLT_PLAYLIST_PROPERTIES( playlist )     MLT_SERVICE_PROPERTIES( MLT_PLAYLIST_SERVICE( playlist ) )
  81
  82 extern mlt_playlist mlt_playlist_init( );
  83 extern mlt_producer mlt_playlist_producer( mlt_playlist self );
  84 extern mlt_service mlt_playlist_service( mlt_playlist self );
  85 extern mlt_properties mlt_playlist_properties( mlt_playlist self );
  86 extern int mlt_playlist_count( mlt_playlist self );
  87 extern int mlt_playlist_clear( mlt_playlist self );
  88 extern int mlt_playlist_append( mlt_playlist self, mlt_producer producer );
  89 extern int mlt_playlist_append_io( mlt_playlist self, mlt_producer producer, mlt_position in, mlt_position out );
  90 extern int mlt_playlist_blank( mlt_playlist self, mlt_position length );
  91 extern mlt_position mlt_playlist_clip( mlt_playlist self, mlt_whence whence, int index );
  92 extern int mlt_playlist_current_clip( mlt_playlist self );
  93 extern mlt_producer mlt_playlist_current( mlt_playlist self );
  94 extern int mlt_playlist_get_clip_info( mlt_playlist self, mlt_playlist_clip_info *info, int index );
  95 extern int mlt_playlist_insert( mlt_playlist self, mlt_producer producer, int where, mlt_position in, mlt_position out );
  96 extern int mlt_playlist_remove( mlt_playlist self, int where );
  97 extern int mlt_playlist_move( mlt_playlist self, int from, int to );
  98 extern int mlt_playlist_resize_clip( mlt_playlist self, int clip, mlt_position in, mlt_position out );
  99 extern int mlt_playlist_repeat_clip( mlt_playlist self, int clip, int repeat );
 100 extern int mlt_playlist_split( mlt_playlist self, int clip, mlt_position position );
 101 extern int mlt_playlist_split_at( mlt_playlist self, mlt_position position, int left );
 102 extern int mlt_playlist_join( mlt_playlist self, int clip, int count, int merge );
 103 extern int mlt_playlist_mix( mlt_playlist self, int clip, int length, mlt_transition transition );
 104 extern int mlt_playlist_mix_add( mlt_playlist self, int clip, mlt_transition transition );
 105 extern mlt_producer mlt_playlist_get_clip( mlt_playlist self, int clip );
 106 extern mlt_producer mlt_playlist_get_clip_at( mlt_playlist self, mlt_position position );
 107 extern int mlt_playlist_get_clip_index_at( mlt_playlist self, mlt_position position );
 108 extern int mlt_playlist_clip_is_mix( mlt_playlist self, int clip );
 109 extern void mlt_playlist_consolidate_blanks( mlt_playlist self, int keep_length );
 110 extern int mlt_playlist_is_blank( mlt_playlist self, int clip );
 111 extern int mlt_playlist_is_blank_at( mlt_playlist self, mlt_position position );
 112 extern void mlt_playlist_insert_blank( mlt_playlist self, int clip, int length );
 113 extern void mlt_playlist_pad_blanks( mlt_playlist self, mlt_position position, int length, int find );
 114 extern mlt_producer mlt_playlist_replace_with_blank( mlt_playlist self, int clip );
 115 extern int mlt_playlist_insert_at( mlt_playlist self, mlt_position position, mlt_producer producer, int mode );
 116 extern int mlt_playlist_clip_start( mlt_playlist self, int clip );
 117 extern int mlt_playlist_clip_length( mlt_playlist self, int clip );
 118 extern int mlt_playlist_blanks_from( mlt_playlist self, int clip, int bounded );
 119 extern int mlt_playlist_remove_region( mlt_playlist self, mlt_position position, int length );
 120 extern int mlt_playlist_move_region( mlt_playlist self, mlt_position position, int length, int new_position );
 121 extern void mlt_playlist_close( mlt_playlist self );
 122
 123 #endif
 124