2 * filter_greyscale.c -- greyscale filter
3 * Copyright (C) 2003-2004 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 #include "filter_greyscale.h"
23 #include <framework/mlt_frame.h>
33 struct mlt_filter_s parent
;
40 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
42 mlt_frame_get_image( this, image
, format
, width
, height
, 1 );
44 uint8_t *q
= *image
+ *width
* *height
* 2;
50 /** Filter processing.
53 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
55 mlt_frame_push_get_image( frame
, filter_get_image
);
59 /** Constructor for the filter.
62 mlt_filter
filter_greyscale_init( void *arg
)
64 filter_greyscale
*this = calloc( sizeof( filter_greyscale
), 1 );
67 mlt_filter filter
= &this->parent
;
68 mlt_filter_init( filter
, this );
69 filter
->process
= filter_process
;
71 return ( mlt_filter
)this;