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

   1 /*
   2  * mlt_transition.h -- abstraction for all transition services
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   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.
  10  *
  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.
  15  *
  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.
  19  */
  20
  21 #ifndef _MLT_TRANSITION_H_
  22 #define _MLT_TRANSITION_H_
  23
  24 #include "mlt_service.h"
  25
  26 /** The interface definition for all transitions.
  27 */
  28
  29 struct mlt_transition_s
  30 {
  31         // We're implementing service here
  32         struct mlt_service_s parent;
  33
  34         // public virtual
  35         void ( *close )( mlt_transition );
  36
  37         // protected transition method
  38         mlt_frame ( *process )( mlt_transition, mlt_frame, mlt_frame );
  39
  40         // Protected
  41         void *child;
  42
  43         // track and in/out points
  44         mlt_service producer;
  45         int a_track;
  46         int b_track;
  47         mlt_timecode in;
  48         mlt_timecode out;
  49
  50         // Private
  51         mlt_frame a_frame;
  52         mlt_frame b_frame;
  53 };
  54
  55 /** Public final methods
  56 */
  57
  58 extern int mlt_transition_init( mlt_transition this, void *child );
  59 extern mlt_service mlt_transition_service( mlt_transition this );
  60 extern mlt_properties mlt_transition_properties( mlt_transition this );
  61 extern int mlt_transition_connect( mlt_transition this, mlt_service producer, int a_track, int b_track );
  62 extern void mlt_transition_set_in_and_out( mlt_transition this, mlt_timecode in, mlt_timecode out );
  63 extern int mlt_transition_get_a_track( mlt_transition this );
  64 extern int mlt_transition_get_b_track( mlt_transition this );
  65 extern mlt_timecode mlt_transition_get_in( mlt_transition this );
  66 extern mlt_timecode mlt_transition_get_out( mlt_transition this );
  67 extern void mlt_transition_close( mlt_transition this );
  68
  69 #endif