2 * filter_tcolor.c -- tcolor filter
3 * Copyright (c) 2007 Marco Gittler <g.marco@freenet.de>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <framework/mlt_filter.h>
21 #include <framework/mlt_frame.h>
27 #define MIN(a,b) (a<b?a:b)
28 #define MAX(a,b) (a<b?b:a)
30 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
33 mlt_filter filter
= mlt_frame_pop_service( this );
34 int error
= mlt_frame_get_image( this, image
, format
, width
, height
, 1 );
36 if ( error
== 0 && *image
&& *format
== mlt_image_yuv422
)
39 double over_cr
= mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter
), "oversaturate_cr" )/100.0;
40 double over_cb
= mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter
), "oversaturate_cb" )/100.0;
42 int video_width
= *width
;
43 int video_height
= *height
;
47 for (y
=0;y
<video_height
;y
++){
48 for (x
=0;x
<video_width
;x
+=2){
49 uint8_t *pix
=(*image
+y
*video_width
*2+x
*2+1);
50 uint8_t *pix1
=(*image
+y
*video_width
*2+x
*2+3);
51 *pix
=MIN(MAX( ((double)*pix
-127.0)*over_cb
+127.0,0),255);
52 *pix1
=MIN(MAX( ((double)*pix1
-127.0)*over_cr
+127.0,0),255);
55 // short a, short b, short c, short d
57 // b: +=blue, -=yellow
65 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
67 mlt_frame_push_service( frame
, this );
68 mlt_frame_push_get_image( frame
, filter_get_image
);
73 mlt_filter
filter_tcolor_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *arg
)
75 mlt_filter
this = mlt_filter_new( );
78 this->process
= filter_process
;
79 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "oversaturate_cr", "190" );
80 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "oversaturate_cb", "190" );