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

   1 /*
   2  * mlt_geometry.h -- provides the geometry API
   3  * Copyright (C) 2004-2005 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_GEOMETRY_H
  22 #define _MLT_GEOMETRY_H
  23
  24 #include "mlt_types.h"
  25
  26 struct mlt_geometry_item_s
  27 {
  28         // Will be 1 when this is a key frame
  29         int key;
  30         // The actual frame this corresponds to
  31         int frame;
  32         // Distort
  33         int distort;
  34         // x,y are upper left
  35         float x, y, w, h, mix;
  36         // Indicates which values are fixed
  37         int f[ 5 ];
  38 };
  39
  40 struct mlt_geometry_s
  41 {
  42         void *local;
  43 };
  44
  45 // Create a new geometry structure
  46 extern mlt_geometry mlt_geometry_init( );
  47 // Parse the geometry specification for a given length and normalised width/height (-1 for default)
  48 extern int mlt_geometry_parse( mlt_geometry self, char *data, int length, int nw, int nh );
  49 // Conditionally refresh the geometry if it's modified
  50 extern int mlt_geometry_refresh( mlt_geometry self, char *data, int length, int nw, int nh );
  51 // Get and set the length
  52 extern int mlt_geometry_get_length( mlt_geometry self );
  53 extern void mlt_geometry_set_length( mlt_geometry self, int length );
  54 // Parse an item - doesn't affect the geometry itself but uses current information for evaluation
  55 // (item->frame should be specified if not included in the data itself)
  56 extern int mlt_geometry_parse_item( mlt_geometry self, mlt_geometry_item item, char *data );
  57 // Fetch a geometry item for an absolute position
  58 extern int mlt_geometry_fetch( mlt_geometry self, mlt_geometry_item item, float position );
  59 // Specify a geometry item at an absolute position
  60 extern int mlt_geometry_insert( mlt_geometry self, mlt_geometry_item item );
  61 // Remove the key at the specified position
  62 extern int mlt_geometry_remove( mlt_geometry self, int position );
  63 // Get the key at the position or the next following
  64 extern int mlt_geometry_next_key( mlt_geometry self, mlt_geometry_item item, int position );
  65 extern int mlt_geometry_prev_key( mlt_geometry self, mlt_geometry_item item, int position );
  66 // Serialise the current geometry
  67 extern char *mlt_geometry_serialise_cut( mlt_geometry self, int in, int out );
  68 extern char *mlt_geometry_serialise( mlt_geometry self );
  69 // Close the geometry
  70 extern void mlt_geometry_close( mlt_geometry self );
  71
  72 #endif
  73