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

   1 /**
   2  * \file mlt_playlist.h
   3  * \brief playlist service class
   4  *
   5  * Copyright (C) 2003-2008 Ushodaya Enterprises Limited
   6  * \author Charles Yates <charles.yates@pandora.be>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifndef _MLT_PLAYLIST_H_
  24 #define _MLT_PLAYLIST_H_
  25
  26 #include "mlt_producer.h"
  27
  28 /** \brief structure for returning clip information
  29  */
  30
  31 typedef struct
  32 {
  33         int clip;                 /**< the index of the clip within the playlist */
  34         mlt_producer producer;    /**< the clip's producer (or parent producer of a cut) */
  35         mlt_producer cut;         /**< the clips' cut producer */
  36         mlt_position start;       /**< the time this begins relative to the beginning of the playlist */
  37         char *resource;           /**< the file name or address of the clip */
  38         mlt_position frame_in;    /**< the clip's in point */
  39         mlt_position frame_out;   /**< the clip's out point */
  40         mlt_position frame_count; /**< the duration of the clip */
  41         mlt_position length;      /**< the unedited duration of the clip */
  42         float fps;                /**< the frame rate of the clip */
  43         int repeat;               /**< the number of times the clip is repeated */
  44 }
  45 mlt_playlist_clip_info;
  46
  47 /** Playlist Entry
  48 */
  49
  50 typedef struct playlist_entry_s playlist_entry;
  51
  52 /** \brief Playlist class
  53  *
  54  * A playlist is a sequential container of producers and blank spaces. The class provides all
  55  * sorts of playlist assembly and manipulation routines. A playlist is also a producer within
  56  * the framework.
  57  *
  58  * \extends mlt_producer_s
  59  * \properties \em autoclose Set this true if you are doing sequential processing and want to
  60  * automatically close producers as they are finished being used to free resources.
  61  * \properties \em meta.fx_cut Set true on a producer to indicate that it is a "fx_cut,"
  62  * which is a way to add filters as a playlist entry - useful only in a multitrack. See FxCut on the wiki.
  63  * \properties \em mix_in
  64  * \properties \em mix_out
  65  */
  66
  67 struct mlt_playlist_s
  68 {
  69         struct mlt_producer_s parent;
  70         struct mlt_producer_s blank;
  71
  72         int size;
  73         int count;
  74         playlist_entry **list;
  75 };
  76
  77 #define MLT_PLAYLIST_PRODUCER( playlist )       ( &( playlist )->parent )
  78 #define MLT_PLAYLIST_SERVICE( playlist )        MLT_PRODUCER_SERVICE( MLT_PLAYLIST_PRODUCER( playlist ) )
  79 #define MLT_PLAYLIST_PROPERTIES( playlist )     MLT_SERVICE_PROPERTIES( MLT_PLAYLIST_SERVICE( playlist ) )
  80
  81 extern mlt_playlist mlt_playlist_init( );
  82 extern mlt_producer mlt_playlist_producer( mlt_playlist self );
  83 extern mlt_service mlt_playlist_service( mlt_playlist self );
  84 extern mlt_properties mlt_playlist_properties( mlt_playlist self );
  85 extern int mlt_playlist_count( mlt_playlist self );
  86 extern int mlt_playlist_clear( mlt_playlist self );
  87 extern int mlt_playlist_append( mlt_playlist self, mlt_producer producer );
  88 extern int mlt_playlist_append_io( mlt_playlist self, mlt_producer producer, mlt_position in, mlt_position out );
  89 extern int mlt_playlist_blank( mlt_playlist self, mlt_position length );
  90 extern mlt_position mlt_playlist_clip( mlt_playlist self, mlt_whence whence, int index );
  91 extern int mlt_playlist_current_clip( mlt_playlist self );
  92 extern mlt_producer mlt_playlist_current( mlt_playlist self );
  93 extern int mlt_playlist_get_clip_info( mlt_playlist self, mlt_playlist_clip_info *info, int index );
  94 extern int mlt_playlist_insert( mlt_playlist self, mlt_producer producer, int where, mlt_position in, mlt_position out );
  95 extern int mlt_playlist_remove( mlt_playlist self, int where );
  96 extern int mlt_playlist_move( mlt_playlist self, int from, int to );
  97 extern int mlt_playlist_resize_clip( mlt_playlist self, int clip, mlt_position in, mlt_position out );
  98 extern int mlt_playlist_repeat_clip( mlt_playlist self, int clip, int repeat );
  99 extern int mlt_playlist_split( mlt_playlist self, int clip, mlt_position position );
 100 extern int mlt_playlist_split_at( mlt_playlist self, mlt_position position, int left );
 101 extern int mlt_playlist_join( mlt_playlist self, int clip, int count, int merge );
 102 extern int mlt_playlist_mix( mlt_playlist self, int clip, int length, mlt_transition transition );
 103 extern int mlt_playlist_mix_add( mlt_playlist self, int clip, mlt_transition transition );
 104 extern mlt_producer mlt_playlist_get_clip( mlt_playlist self, int clip );
 105 extern mlt_producer mlt_playlist_get_clip_at( mlt_playlist self, mlt_position position );
 106 extern int mlt_playlist_get_clip_index_at( mlt_playlist self, mlt_position position );
 107 extern int mlt_playlist_clip_is_mix( mlt_playlist self, int clip );
 108 extern void mlt_playlist_consolidate_blanks( mlt_playlist self, int keep_length );
 109 extern int mlt_playlist_is_blank( mlt_playlist self, int clip );
 110 extern int mlt_playlist_is_blank_at( mlt_playlist self, mlt_position position );
 111 extern void mlt_playlist_insert_blank( mlt_playlist self, int clip, int length );
 112 extern void mlt_playlist_pad_blanks( mlt_playlist self, mlt_position position, int length, int find );
 113 extern mlt_producer mlt_playlist_replace_with_blank( mlt_playlist self, int clip );
 114 extern int mlt_playlist_insert_at( mlt_playlist self, mlt_position position, mlt_producer producer, int mode );
 115 extern int mlt_playlist_clip_start( mlt_playlist self, int clip );
 116 extern int mlt_playlist_clip_length( mlt_playlist self, int clip );
 117 extern int mlt_playlist_blanks_from( mlt_playlist self, int clip, int bounded );
 118 extern int mlt_playlist_remove_region( mlt_playlist self, mlt_position position, int length );
 119 extern int mlt_playlist_move_region( mlt_playlist self, mlt_position position, int length, int new_position );
 120 extern void mlt_playlist_close( mlt_playlist self );
 121
 122 #endif
 123