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63 lines
2.1 KiB
63 lines
2.1 KiB
/*
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* mlt_filter.h -- abstraction for all filter services
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* Copyright (C) 2003-2004 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_FILTER_H_
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#define _MLT_FILTER_H_
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#include "mlt_service.h"
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/** The interface definition for all filters.
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*/
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struct mlt_filter_s
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{
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/* We're implementing service here */
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struct mlt_service_s parent;
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/* public virtual */
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void ( *close )( mlt_filter );
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/* protected filter method */
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mlt_frame ( *process )( mlt_filter, mlt_frame );
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/* Protected */
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void *child;
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};
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/** Public final methods
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*/
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#define MLT_FILTER_SERVICE( filter ) ( &( filter )->parent )
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#define MLT_FILTER_PROPERTIES( filter ) MLT_SERVICE_PROPERTIES( MLT_FILTER_SERVICE( filter ) )
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extern int mlt_filter_init( mlt_filter self, void *child );
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extern mlt_filter mlt_filter_new( );
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extern mlt_service mlt_filter_service( mlt_filter self );
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extern mlt_properties mlt_filter_properties( mlt_filter self );
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extern mlt_frame mlt_filter_process( mlt_filter self, mlt_frame that );
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extern int mlt_filter_connect( mlt_filter self, mlt_service producer, int index );
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extern void mlt_filter_set_in_and_out( mlt_filter self, mlt_position in, mlt_position out );
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extern int mlt_filter_get_track( mlt_filter self );
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extern mlt_position mlt_filter_get_in( mlt_filter self );
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extern mlt_position mlt_filter_get_out( mlt_filter self );
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extern void mlt_filter_close( mlt_filter );
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#endif
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