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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, 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