2 * mlt_geometry.h -- provides the geometry API
3 * Copyright (C) 2004-2005 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.
21 #ifndef _MLT_GEOMETRY_H
22 #define _MLT_GEOMETRY_H
24 #include "mlt_types.h"
26 struct mlt_geometry_item_s
28 // Will be 1 when this is a key frame
30 // The actual frame this corresponds to
35 float x
, y
, w
, h
, mix
;
36 // Indicates which values are fixed
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_key( mlt_geometry self
, mlt_geometry_item item
, int position
);
65 // Serialise the current geometry
66 extern char *mlt_geometry_serialise_cut( mlt_geometry self
, int in
, int out
);
67 extern char *mlt_geometry_serialise( mlt_geometry self
);
69 extern void mlt_geometry_close( mlt_geometry self
);