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74 lines
3.0 KiB
74 lines
3.0 KiB
/*
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* mlt_geometry.h -- provides the geometry API
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* Copyright (C) 2004-2005 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _MLT_GEOMETRY_H
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#define _MLT_GEOMETRY_H
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#include "mlt_types.h"
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struct mlt_geometry_item_s
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{
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/* Will be 1 when this is a key frame */
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int key;
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/* The actual frame this corresponds to */
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int frame;
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/* Distort */
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int distort;
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/* x,y are upper left */
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float x, y, w, h, mix;
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/* Indicates which values are fixed */
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int f[ 5 ];
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};
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struct mlt_geometry_s
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{
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void *local;
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};
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/* Create a new geometry structure */
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extern mlt_geometry mlt_geometry_init( );
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/* Parse the geometry specification for a given length and normalised width/height (-1 for default) */
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extern int mlt_geometry_parse( mlt_geometry self, char *data, int length, int nw, int nh );
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/* Conditionally refresh the geometry if it's modified */
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extern int mlt_geometry_refresh( mlt_geometry self, char *data, int length, int nw, int nh );
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/* Get and set the length */
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extern int mlt_geometry_get_length( mlt_geometry self );
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extern void mlt_geometry_set_length( mlt_geometry self, int length );
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/* Parse an item - doesn't affect the geometry itself but uses current information for evaluation */
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/* (item->frame should be specified if not included in the data itself) */
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extern int mlt_geometry_parse_item( mlt_geometry self, mlt_geometry_item item, char *data );
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/* Fetch a geometry item for an absolute position */
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extern int mlt_geometry_fetch( mlt_geometry self, mlt_geometry_item item, float position );
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/* Specify a geometry item at an absolute position */
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extern int mlt_geometry_insert( mlt_geometry self, mlt_geometry_item item );
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/* Remove the key at the specified position */
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extern int mlt_geometry_remove( mlt_geometry self, int position );
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/* Get the key at the position or the next following */
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extern int mlt_geometry_next_key( mlt_geometry self, mlt_geometry_item item, int position );
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extern int mlt_geometry_prev_key( mlt_geometry self, mlt_geometry_item item, int position );
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/* Serialise the current geometry */
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extern char *mlt_geometry_serialise_cut( mlt_geometry self, int in, int out );
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extern char *mlt_geometry_serialise( mlt_geometry self );
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/* Close the geometry */
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extern void mlt_geometry_close( mlt_geometry self );
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#endif
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