2 * filter_greyscale.c -- greyscale filter
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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.
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.
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
21 #include "filter_greyscale.h"
23 #include <framework/mlt_frame.h>
31 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
33 int error
= mlt_frame_get_image( this, image
, format
, width
, height
, 1 );
34 if ( error
== 0 && *format
== mlt_image_yuv422
)
37 uint8_t *q
= *image
+ *width
* *height
* 2;
44 /** Filter processing.
47 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
49 mlt_frame_push_get_image( frame
, filter_get_image
);
53 /** Constructor for the filter.
56 mlt_filter
filter_greyscale_init( void *arg
)
58 mlt_filter
this = mlt_filter_new( );
60 this->process
= filter_process
;